我有一个长文本文件，每个段落有6行和7行。我需要将所有七行段落写入文件，并将六行段落写入文件。 或删除6行（7行）段落。 每个段落用空行（或两个空行）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...
我想在Windows上使用python 3。欢迎任何帮助。谢谢！
答案 0 :(得分：0)
作为对stackoverflow的欢迎，并且因为我认为您现在已经搜索了更多代码，我建议您使用以下代码。
它验证段落不超过7行且不少于6行。它会在源中存在此类段落时发出警告。
您将删除所有打印件以获得干净的代码，但使用它们可以遵循算法。
我认为它没有任何错误，但不要把它当作100％确定。
这不是唯一可行的方式，但我选择了可以用于所有类型文件的方式，无论大与否：一次迭代一行。可以一次读取整个文件，然后分成行列表，或者在正则表达式的帮助下处理;但是，当文件很大时，一次读取所有内容都会耗费内存。
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()
我也提出了你的问题，因为这是一个不容易解决的问题，并且不会让你有一个帖子和一个downvote，它是一个开端的士气低落。正如其他人所说的那样，下次尝试让你的演示更好。
编辑：
这是一个简化的代码，用于仅包含6或7行的段落，正好用1或2行分隔，如问题的措辞中所述
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()