Python uses a regular search string or a floating-point number code instance in a file _python

Use Python and numpy to process data more frequently, writing several small functions to easily read and write data:

#-*-Coding:utf-8-*-#----------------------------------------------------------------------# FileName: gettxtdata.py #功能: Reading numeric data (floating point numbers) #主要提供类似matlab中的dlmread和dlmwrite函数 #同时提供loadtxtdata和savetxtdata函数 #Data in strings and files: 2013-1-10 #Author: Wu Xuping #----------------------------------------------------------------------Import NumPy #------- ---------------------------------------------------------------def stringtodoublearray (String): "" "#
  
  Replaces all non-double characters in a string with a space #以 ' # ' begins with a comment until the end of the line, and is emptied #返回一维numpy. Array "" "from Stringio import Stringio import re Dataarray=numpy.empty ([0],numpy.float64) If Len (String.strip ()) >0: #清空注释行, all with the ' # ' start character doublestring=re.s UB (' #.*$ ', "", String, Count=0, Flags=re.) IGNORECASE) #删除非数字字符 doublestring=re.sub (' [^0-9.e+-] ', "", Doublestring, Count=0, Flags=re. IGNORECASE) #去掉不正确的数字格式 (code duplication is necessary) doublestring=re.sub (' [. e+-] (? =\s) ', ' ", doublestring, Count=0, Flags=re. IGNORECASE) doublestring=re.sub (' [. e+-] (? =\s) ', " ", Doublestring, Count=0, Flags=re. IGNORECASE) doublestring=re.sub (' [e+-]$ ',] ', doublestring, count=0, Flags=re. IGNORECASE) doublestring=re.sub (' [e+-]$ ',] ', doublestring, count=0, Flags=re. IGNORECASE) #去掉首尾空格 Doublestring=doublestring.strip () If Len (doublestring) >0:striods=stringio (double String) dataarray= Numpy.genfromtxt (striods) return DataArray #----------------------------------------------- -----------------------def getdoublelistfromstring (String): "" "#使用换行符分割字符串 #将字符串中的所有非Double类型的字符全部替换成空格 #以 ' # ' opening note Released to the end of the line, are emptied #将每一行转换成numpy. Array array #返回numpy the list "" "from Stringio import Stringio import re Doublelis T=[] Stringlist=string.split (' \ n ') #使用换行符分割字符串 for line in Stringlist:if Len (Line.strip ()) >0: #清空注释行, all with ' # ' opening character doublestring=re.sub (' #.*$ ', ' ", Line, Count=0, Flags=re. IGNORECASE) #删除非数字字符 doublestring=re.sub (' [^0-9.e+-] ', "", Doublestring, Count=0, Flags=re. IgnorecASE) #去掉不正确的数字格式 (code duplication is necessary) doublestring=re.sub (' [. e+-] (? =\s) ', "", Doublestring, Count=0, Flags=re. IGNORECASE) doublestring=re.sub (' [. e+-] (? =\s) ', "", Doublestring, Count=0, Flags=re. IGNORECASE) doublestring=re.sub (' [e+-]$ ',] ', doublestring, count=0, Flags=re. IGNORECASE) doublestring=re.sub (' [e+-]$ ',] ', doublestring, count=0, Flags=re. IGNORECASE) #去掉首尾空格 Doublestring=doublestring.strip () If Len (doublestring) >0:striods=stringi O (doublestring) doublelist.append (Numpy.genfromtxt (striods)) return Doublelist #-------------------------- --------------------------------------------def getdoublelistfromfile (FileName): "" "# Replaces all of the double characters in a text file with the Numpy.array array #每一行都是numpy. Array # #返回numpy a list of. Array #注意: Each element that returns a list is a Numpy.array array #注 Meaning: Each element of the return list (or file per line) can contain different numbers "" "File=open (FileName, ' r ') Read_file = File.read () file.close () doublelist=g Etdoublelistfromstring (read_file) return DoubLelist def dlmread (filename,dtype=numpy.float64): "" "#Load Data from Txt-file. #分隔符默认是: ";", ",", space class (including \ t) and so on #以 # is considered to be a comment and will not be read #Return value: Two-dimensional numeric array (Numpy.ndarray) #对文本中数据的排列格式要求最低, and allow annotation characters to appear, intelligent process The highest, but slower "" "Doublelist=getdoublelistfromfile (FileName) dlsize=[] #每一行数组的大小 for DL in DoubleList:dlsize.appen D (dl.size) mincolumnsize=min (dlsize) #数组的最大列数 Maxcolumnsize=max (dlsize) #数组的最小列数 #数组创建和赋值 doublearray=numpy.emp Ty ([Len (doublelist), Mincolumnsize],dtype=dtype) Row=range (0,len (doublelist)) Colum=range (0,mincolumnsize) for I in Row:for J. Colum:doublearray[i][j]=doublelist[i][j] return Doublearray #----------------------- -----------------------------------------------def loadtxtdata (filename,delimiter= ""): "" #Load Data from Txt-file
  With delimiter. #分隔符默认是: ";", ",", space class (including \ t) and custom delimiter #Return value: Two-dimensional numeric array (Numpy.ndarray) #对文本中数据的排列格式要求较高, and no annotation characters are allowed, the degree of intelligence is low,
But faster "" "from Stringio import Stringio  Import re file_handle=open (filename, ' R ') linesall=file_handle.read () #读入字符串 file_handle.close () delimiteral L=delimiter+ ",;" #分隔符 spacestring= "" #空格 for Rchar in Delimiterall:linesall=linesall.replace (rchar,spacestring) return nump Y.genfromtxt (Stringio (Linesall)) #----------------------------------------------------------------------Def
  Savetxtdata (filename, X, fmt= '%.8e ', delimiter= ', newline= ' \ n '): "" "Save Data to Txt-file. "" "Numpy.savetxt (filename, X, fmt=fmt, Delimiter=delimiter, Newline=newline) return True #---------------------
  -------------------------------------------------def dlmwrite (filename, X, fmt= '%.8e ', delimiter= ', newline= ' \ n '):
  "" "Save Data to Txt-file. "" "Numpy.savetxt (filename, X, fmt=fmt, Delimiter=delimiter, Newline=newline) return True #--------------------- -------------------------------------------------#测试程序 #-------------------------------------------------------- --------------if __name__ = = ' __main__ ': #生成随机数 data=numpy.random.randn (3,4) filename= ' d:/x.txt ' #写入文件 dlmwrite (filename,data)
  X=getdoublelistfromfile (filename) print (x) print (dlmread (filename)) Y=stringtodoublearray (' 79l890joj ') print (y) Z=loadtxtdata (filename) print (z)

I have only tried it in the python2.7, and if I want to use it in python3.x, I can test it myself.