使用Python從文本文件中刪除X線段落

Question

我有一個長文本文件，每個段落有6行和7行。 我需要將所有七個行段落都寫入文件，然后將六個行段落都寫入文件。 或刪除6行（7行）段落。 每個段落用空白行（或兩個空白行）分隔。 文本文件示例：

Firs Name Last Name
address1
Address2
Note 1
Note 2
Note3
Note 4

First Name LastName
add 1
add 2
Note2
Note3
Note4

etc...

我想將python 3用於Windows。 歡迎任何幫助。 謝謝！

Answer 1

作為對stackoverflow的歡迎，並且由於我認為您現在已經在搜索更多代碼，因此為您提出以下代碼。

它驗證段落不超過7行且不少於6行。 當源中存在此類段落時，它將發出警告。

您將刪除所有打印件以得到清晰的代碼，但是使用它們可以遵循算法。

我認為其中沒有錯誤，但不要以為100％可以肯定。

這不是唯一的方法，但是我選擇了可​​用於所有類型的文件的方法，無論是否大小：一次迭代一行。 可以一次讀取整個文件，然后將其分成幾行，或者在正則表達式的幫助下進行處理。 但是，當一個文件很大時，一次讀取所有文件會占用大量內存。

with open('source.txt') as fsource,\
     open('SIX.txt','w') as six,  open('SEVEN.txt','w') as seven:

    buf = []
    cnt = 0
    exceeding7paragraphs = 0
    tinyparagraphs = 0

    line = 'go'
    while line:
        line = fsource.readline()
        cnt += 1
        buf.append(line)

        if len(buf)<6 and line.rstrip('\n\r')=='':
            tinyparagraphs += 1
            print cnt,repr(line),"this line of paragraph < 6 is void,"+\
                  "\nthe treatment of all this paragraph is skipped\n"+\
                  '\n# '+str(cnt)+' '+ repr(line)+" skipped line "
            buf = []
            while line and line.rstrip('\n\r')=='':
                line = fsource.readline()
                cnt += 1
                if line=='':
                    print "line",cnt,"is '' , EOF -> the program will be stopped"
                elif line.rstrip('\n\r')=='':
                    print '#',cnt,repr(line)
                else:
                    buf.append(line)
                    print '!',cnt,repr(line),' put in void buf'
        else:
            print cnt,repr(line),' put in buf'




        if len(buf)==6:
            line = fsource.readline() # reading a potential seventh line of a paragraph
            cnt += 1

            if line.rstrip('\n\r'): # means the content of the seventh line isn't void
                buf.append(line)
                print cnt,repr(line),'seventh line put in buf'
                line = fsource.readline()
                cnt += 1

                if line.rstrip('\n\r'): # means the content of the eighth line isn't void
                    exceeding7paragraphs += 1
                    print cnt,repr(line),"the eight line isn't void,"+\
                          "\nthe treatment of all this paragraph is skipped"+\
                          "\neighth line skipped"
                    buf = []
                    while line and line.rstrip('\n\r'):
                        line = fsource.readline()
                        cnt += 1
                        if line=='':
                            print "line",cnt,"is '' , EOF -> the program will be stopped"
                        elif line.rstrip('\n\r')=='':
                            print '\n#',cnt,repr(line)
                        else:
                            print str(cnt) + ' ' + repr(line)+' skipped line'

                else:
                    if line=='':
                        print cnt,"line is '' , EOF -> the program will be stopped\n"
                    else: # line.rstrip('\n\r') is ''
                        print cnt,'eighth line is void',repr(line)
                    seven.write(''.join(buf) + '\n')
                    print buf,'\n',len(buf),'lines recorded in file SEVEN\n'
                    buf = []

            else:
                print cnt,repr(line),'seventh line: void'
                six.write(''.join(buf) + '\n')
                print buf,'\n',len(buf),'lines recorded in file SIX'
                buf = []
                if line=='':
                    print "line",cnt,"is '' , EOF -> the program will be stopped"
                else:
                    print '\nthe line is',cnt, repr(line)

            while line and line.rstrip('\n\r')=='':
                line = fsource.readline()
                cnt += 1
                if line=='':
                    print "line",cnt,"is '' , EOF -> the program will be stopped"
                elif line.rstrip('\n\r')=='':
                    print '#',cnt,repr(line)
                else: # line.rstrip('\n\r') != ''
                    buf.append(line)
                    print '!',cnt,repr(line),' put in void buf'

if exceeding7paragraphs>0:
    print '\nWARNING :'+\
          '\nThere are '+str(exceeding7paragraphs)+' paragraphs whose number of lines exceeds 7.'

if tinyparagraphs>0:
    print '\nWARNING :'+\
          '\nThere are '+str(tinyparagraphs)+' paragraphs whose number of lines is less than 6.'


print '\n===================================================================='
print 'File SIX\n'
with open('SIX.txt') as six:
    print six.read()


print '===================================================================='
print 'File SEVEN\n'
with open('SEVEN.txt') as seven:
    print seven.read()

我也贊成您的問題，因為這不是一個看起來似乎很容易解決的問題，為了不讓您發表一篇文章並發表一篇反對意見，它開始令人沮喪。 就像其他人所說的那樣，下次嘗試使演示文稿更好。

。

編輯：

這是一個簡化的代碼，用於文本中僅包含6或7行的段落，正好由1或2行分隔，如問題措辭中所述

with open('source2.txt') as fsource,\
     open('SIX.txt','w') as six,  open('SEVEN.txt','w') as seven:

    buf = []

    line = fsource.readline()
    while not line: # to go to the first non empty line
        line = fsource.readline()


    while True:
        buf.append(line) # this line is the first of a paragraph
        print '\n- first line of a paragraph',repr(line)

        for i in xrange(5):
            buf.append(fsource.readline())
        # at this point , 6 lines of a paragraph have been read
        print '-- buf 6 : ',buf

        line = fsource.readline()
        print '--- line seventh',repr(line),id(line)

        if line.rstrip('\r\n'):
            buf.append(line)
            seven.write(''.join(buf) + '\n')
            buf = []
            line = fsource.readline()
        else:
            six.write(''.join(buf) + '\n')
            buf = []
        # at this point, line is the empty line after a paragraph or EOF
        print '---- line after',repr(line),id(line)

        line = fsource.readline()
        print '----- second line after',repr(line)
        # at this point, line is an empty line after a paragraph or EOF
        # or the first line of a new paragraph

        if not line: # it is EOF
            break
        if not line.rstrip('\r\n'): # it is a second empty line
            line = fsource.readline()
        # now line is the first of a new paragraph


print '\n===================================================================='
print 'File SIX\n'
with open('SIX.txt') as six:
    print six.read()


print '===================================================================='
print 'File SEVEN\n'
with open('SEVEN.txt') as seven:
    print seven.read()