Question

我正在将文本文档导入列表，然后删除任何以大写字母开头的项目。我可以运行代码，但输出文件中没有任何内容。

相关守则：

def filtercaps(infilename,outfilename):

    import csv
    list_of_words=[]
    list=[]
    a=0    
    with open(infilename, newline='') as inputfile:
            for row in csv.reader(inputfile):
                list.append(row)
    for i in range(len(list)):
        c=str(list[i])
        if c[0] in 'qwertyuiopasdfghjklzxcvbnm':
           list_of_words[a]=list[i]
           a=a+1
    f = open(outfilename)
    for i in range(len(list_of_words)):
        f.write(list_of_words[i])
    f.close()

filtercaps("Enable1.txt","Enable2.txt")

Answer 1

从代码中可以看出，您的文件实际上是一个csv文件（您正在使用csv.reader读取该文件）。假设是这种情况，以下情况应该有效：

def filtercaps(infilename,outfilename):

  import csv
  list_of_words=[]
  list=[]
  with open(infilename) as inputfile:
      for row in csv.reader(inputfile):
          list.append(row)
      for l in list:
          if len(l) == 0:
              continue
          first_entry = l[0]
          first_letter = first_entry[0][0]
          if first_letter in 'qwertyuiopasdfghjklzxcvbnm':
              list_of_words.append(l)
  f = open(outfilename, "w")
  writer = csv.writer(f)
  for l in list_of_words:
      writer.writerow(l)
  f.close()

filtercaps("Enable1.txt","Enable2.txt")

还有其他一些方法可以让脚本更加惯用于python。

从Python3.4中的输入文件中删除大写字符串？

1 个答案: