forked from lijiext/lammps
337 lines
9.4 KiB
Python
337 lines
9.4 KiB
Python
# Pizza.py toolkit, www.cs.sandia.gov/~sjplimp/pizza.html
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# Steve Plimpton, sjplimp@sandia.gov, Sandia National Laboratories
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#
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# Copyright (2005) Sandia Corporation. Under the terms of Contract
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# DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
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# certain rights in this software. This software is distributed under
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# the GNU General Public License.
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# log tool
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oneline = "Read LAMMPS log files and extract thermodynamic data"
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docstr = """
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l = log("file1") read in one or more log files
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l = log("log1 log2.gz") can be gzipped
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l = log("file*") wildcard expands to multiple files
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l = log("log.lammps",0) two args = store filename, but don't read
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incomplete and duplicate thermo entries are deleted
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time = l.next() read new thermo info from file
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used with 2-argument constructor to allow reading thermo incrementally
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return time stamp of last thermo read
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return -1 if no new thermo since last read
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nvec = l.nvec # of vectors of thermo info
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nlen = l.nlen length of each vectors
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names = l.names list of vector names
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t,pe,... = l.get("Time","KE",...) return one or more vectors of values
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l.write("file.txt") write all vectors to a file
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l.write("file.txt","Time","PE",...) write listed vectors to a file
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get and write allow abbreviated (uniquely) vector names
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"""
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# History
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# 8/05, Steve Plimpton (SNL): original version
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# ToDo list
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# Variables
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# nvec = # of vectors
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# nlen = length of each vector
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# names = list of vector names
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# ptr = dictionary, key = name, value = index into data for which column
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# data[i][j] = 2d array of floats, i = 0 to # of entries, j = 0 to nvecs-1
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# style = style of LAMMPS log file, 1 = multi, 2 = one, 3 = gran
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# firststr = string that begins a thermo section in log file
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# increment = 1 if log file being read incrementally
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# eof = ptr into incremental file for where to start next read
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# Imports and external programs
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import sys, re, glob
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from os import popen
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try: tmp = PIZZA_GUNZIP
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except: PIZZA_GUNZIP = "gunzip"
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# Class definition
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class log:
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# --------------------------------------------------------------------
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def __init__(self,*list):
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self.nvec = 0
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self.names = []
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self.ptr = {}
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self.data = []
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# flist = list of all log file names
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words = list[0].split()
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self.flist = []
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for word in words: self.flist += glob.glob(word)
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if len(self.flist) == 0 and len(list) == 1:
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raise StandardError,"no log file specified"
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if len(list) == 1:
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self.increment = 0
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self.read_all()
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else:
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if len(self.flist) > 1:
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raise StandardError,"can only incrementally read one log file"
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self.increment = 1
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self.eof = 0
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# --------------------------------------------------------------------
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# read all thermo from all files
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def read_all(self):
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self.read_header(self.flist[0])
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if self.nvec == 0: raise StandardError,"log file has no values"
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# read all files
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for file in self.flist: self.read_one(file)
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print
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# sort entries by timestep, cull duplicates
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self.data.sort(self.compare)
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self.cull()
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self.nlen = len(self.data)
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print "read %d log entries" % self.nlen
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# --------------------------------------------------------------------
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def next(self):
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if not self.increment: raise StandardError,"cannot read incrementally"
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if self.nvec == 0:
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try: open(self.flist[0],'r')
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except: return -1
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self.read_header(self.flist[0])
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if self.nvec == 0: return -1
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self.eof = self.read_one(self.flist[0],self.eof)
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return int(self.data[-1][0])
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# --------------------------------------------------------------------
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def get(self,*keys):
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if len(keys) == 0:
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raise StandardError, "no log vectors specified"
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map = []
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for key in keys:
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if self.ptr.has_key(key):
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map.append(self.ptr[key])
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else:
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count = 0
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for i in range(self.nvec):
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if self.names[i].find(key) == 0:
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count += 1
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index = i
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if count == 1:
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map.append(index)
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else:
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raise StandardError, "unique log vector %s not found" % key
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vecs = []
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for i in range(len(keys)):
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vecs.append(self.nlen * [0])
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for j in xrange(self.nlen):
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vecs[i][j] = self.data[j][map[i]]
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if len(keys) == 1: return vecs[0]
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else: return vecs
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# --------------------------------------------------------------------
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def write(self,filename,*keys):
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if len(keys):
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map = []
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for key in keys:
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if self.ptr.has_key(key):
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map.append(self.ptr[key])
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else:
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count = 0
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for i in range(self.nvec):
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if self.names[i].find(key) == 0:
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count += 1
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index = i
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if count == 1:
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map.append(index)
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else:
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raise StandardError, "unique log vector %s not found" % key
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else:
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map = range(self.nvec)
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f = open(filename,"w")
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for i in xrange(self.nlen):
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for j in xrange(len(map)):
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print >>f,self.data[i][map[j]],
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print >>f
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f.close()
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# --------------------------------------------------------------------
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def compare(self,a,b):
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if a[0] < b[0]:
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return -1
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elif a[0] > b[0]:
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return 1
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else:
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return 0
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# --------------------------------------------------------------------
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def cull(self):
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i = 1
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while i < len(self.data):
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if self.data[i][0] == self.data[i-1][0]: del self.data[i]
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else: i += 1
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# --------------------------------------------------------------------
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def read_header(self,file):
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str_multi = "----- Step"
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str_one = "Step "
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if file[-3:] == ".gz":
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txt = popen("%s -c %s" % (PIZZA_GUNZIP,file),'r').read()
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else:
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txt = open(file).read()
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if txt.find(str_multi) >= 0:
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self.firststr = str_multi
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self.style = 1
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elif txt.find(str_one) >= 0:
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self.firststr = str_one
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self.style = 2
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else:
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return
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if self.style == 1:
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s1 = txt.find(self.firststr)
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s2 = txt.find("\n--",s1)
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if (s2 == -1):
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s2 = txt.find("\nLoop time of",s1)
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pattern = "\s(\S*)\s*="
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keywords = re.findall(pattern,txt[s1:s2])
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keywords.insert(0,"Step")
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i = 0
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for keyword in keywords:
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self.names.append(keyword)
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self.ptr[keyword] = i
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i += 1
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else:
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s1 = txt.find(self.firststr)
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s2 = txt.find("\n",s1)
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line = txt[s1:s2]
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words = line.split()
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for i in range(len(words)):
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self.names.append(words[i])
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self.ptr[words[i]] = i
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self.nvec = len(self.names)
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# --------------------------------------------------------------------
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def read_one(self,*list):
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# if 2nd arg exists set file ptr to that value
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# read entire (rest of) file into txt
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file = list[0]
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if file[-3:] == ".gz":
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f = popen("%s -c %s" % (PIZZA_GUNZIP,file),'rb')
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else:
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f = open(file,'rb')
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if len(list) == 2: f.seek(list[1])
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txt = f.read()
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if file[-3:] == ".gz": eof = 0
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else: eof = f.tell()
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f.close()
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start = last = 0
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while not last:
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# chunk = contiguous set of thermo entries (line or multi-line)
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# s1 = 1st char on 1st line of chunk
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# s2 = 1st char on line after chunk
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# set last = 1 if this is last chunk in file, leave 0 otherwise
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# set start = position in file to start looking for next chunk
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# rewind eof if final entry is incomplete
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s1 = txt.find(self.firststr,start)
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s2 = txt.find("Loop time of",start+1)
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if s1 >= 0 and s2 >= 0 and s1 < s2: # found s1,s2 with s1 before s2
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if self.style == 2:
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s1 = txt.find("\n",s1) + 1
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elif s1 >= 0 and s2 >= 0 and s2 < s1: # found s1,s2 with s2 before s1
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s1 = 0
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elif s1 == -1 and s2 >= 0: # found s2, but no s1
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last = 1
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s1 = 0
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elif s1 >= 0 and s2 == -1: # found s1, but no s2
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last = 1
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if self.style == 1:
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s2 = txt.rfind("\n--",s1) + 1
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else:
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s1 = txt.find("\n",s1) + 1
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s2 = txt.rfind("\n",s1) + 1
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eof -= len(txt) - s2
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elif s1 == -1 and s2 == -1: # found neither
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# could be end-of-file section
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# or entire read was one chunk
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if txt.find("Loop time of",start) == start: # end of file, so exit
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eof -= len(txt) - start # reset eof to "Loop"
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break
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last = 1 # entire read is a chunk
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s1 = 0
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if self.style == 1:
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s2 = txt.rfind("\n--",s1) + 1
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else:
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s2 = txt.rfind("\n",s1) + 1
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eof -= len(txt) - s2
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if s1 == s2: break
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chunk = txt[s1:s2-1]
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start = s2
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# split chunk into entries
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# parse each entry for numeric fields, append to data
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if self.style == 1:
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sections = chunk.split("\n--")
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pat1 = re.compile("Step\s*(\S*)\s")
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pat2 = re.compile("=\s*(\S*)")
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for section in sections:
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word1 = [re.search(pat1,section).group(1)]
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word2 = re.findall(pat2,section)
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words = word1 + word2
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self.data.append(map(float,words))
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else:
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lines = chunk.split("\n")
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for line in lines:
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words = line.split()
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self.data.append(map(float,words))
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# print last timestep of chunk
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print int(self.data[len(self.data)-1][0]),
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sys.stdout.flush()
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return eof
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