TypeError:只能加入一个迭代python
问题描述:
我试图将分隔符插入由前一个函数(ifw(in_list))创建的字符串中。我对\ n或\ t没有任何问题,但是一旦我的代码达到“,”加入它就会崩溃。我已经尝试了几种不同的解决方案,并在网站上查看类似的问题/答案,但我一直得到TypeError:只能加入一个迭代器。你可以提供给我的任何帮助将非常有用。TypeError:只能加入一个迭代python
#! /usr/bin/env python
import os
import sys
import re
delim = os.getenv("QWIKIFWLISTMGR_DELIMITER")
in_list = sys.argv
def delim(in_list):
x = "screw python"
x = os.getenv('QWIKIFWLISTMGR_DELIMITER')
if 'BLANK' in x:
x = ' '.join(ifw(in_list))
return x
elif 'TAB' in x:
x = ifw(in_list)
x = '\t'.join(x)
return x
elif 'NL' in x:
x = ifw(in_list)
x = '\n'.join(x)
return x
elif 'COMMA' in x:
x = ','.join(str(x) for x in (ifw(in_list)))
return
elif 'COLON' in x:
x = ifw(in_list)
x = ':'.join(x)
return x
elif 'SEMICOLON' in x:
x = ifw(in_list)
x = ';'.join(x)
return x
elif 'SLASH' in x:
x = ifw(in_list)
x = '/'.join(x)
return x
else:
x = ifw(in_list)
return
def ifw(in_list):
usr_choice = (in_list)[1]
if usr_choice == 'i':
print(int_sort(in_list))
elif usr_choice =='f':
print(float_sort(in_list))
elif usr_choice == 'w':
print(word_sort(in_list))
def float_sort(in_list):
float_sort = "test"
sorted_float = "test"
float_sort = in_list[2:]
float_sort = ''.join(float_sort)
#float_sort1 = " ".join(list((re.findall(r"((?<!\S)\d+(?!\S))", float_sort))))
#float_sort2 = ' '.join(list(re.findall(r"(\d+\.\d+)", float_sort)
float_sort = " ".join(re.findall(r"\d*\.\d+|\d+", float_sort))
sorted_float = sorted(float_sort, key=len)
return float_sort
#print (float_sort(in_list))
def word_sort(in_list):
word_sort = " 1a "
word_sort = sorted(in_list[2:], key=len) #in_list must be 2 because the program will view usr input as a word
for i in word_sort:
punctuation = '.',',',';','!','/','"','?' #strips punctuation from words
if i in punctuation: #removes punctuation
word_sort = word_sort.replace(i," ")
#word_sort= sorted(word_sort, key=lambda L: (L.lower(), L))
word_sort= " ".join(sorted(word_sort, key=lambda L: (L.lower(), L))) #takes string and sorts by length giving priority to upper over lower when tied
sorted_word = " 1a " #left for testing
sorted_word = re.sub("\S+\d\S+", "", word_sort).strip() #removes any word with a number in it
sorted_word = "".join(sorted_word) #joins the results back into a string
return sorted_word
def int_sort(in_list):
in_list = " ".join(in_list[1:]) # takes information from argv and creates a string with it
int_sort = " ".join(list(reversed(re.findall(r"(?<!\S)\d+(?!\S)", in_list))))
# find all looks for a pattern of anything but a space... any number. anything besides a space in the in_list and returns it
#reveresd flips that return backwards
# list turns that into a list and join makes it a string again
return int_sort
#print int_sort(in_list)
#print (delim(in_list))
答
你ifw
函数没有返回语句,所以它返回None
。
因此该行:
x = ','.join(str(x) for x in (ifw(in_list)))
成为
x = ','.join(str(x) for x in None)
和Python不能在无迭代。
+0
所以当OP说“我对\ n或\ t没有任何问题”时,他们错了,我猜? –
显示你的'ifw'函数 –
为什么你的代码处理COMMA与其他人差别很大? –
或者,如果逗号是问题,我不明白为什么你需要'str(x)for x in'部分。 –