为什么它在控制台中说进程以退出代码 0 完成而不是打印"sen"变量？

Question

import random
import sys

def v1_debug(v1, subject):
if v1 != str and subject != str:
sys.exit()
else:
if subject == 'He' or 'She' or 'It':
for i in v1:
if i == [len(v1)+1]:
if i == 's' or 'z' or 'x' or 'o':
v1 = v1 + 'es'
elif i == 'y':
v1 = v1 - 'y' + 'ies'
elif v1[len(v1)] == 's' and v1[len(v1)+1] == 'h':
v1 = v1 + 'es'
elif v1[len(v1)] == 'c' and v1[len(v1)+1] == 'h':
v1 = v1 + 'es'
if subject == 'I' or 'You' or 'We' or 'They':
for i in v1:
if i == v1[len(v1)+1]:
v1 = v1 + 'ing'
return ''

def default_positive_form():
try:
sbj = ['He',
'She',
'It',
'I',
'You',
'We',
'They']
v1 = ['be',
'beat',
'become',
'begin',
'bend',
'bet',
'bid',
'bite',
'blow',
'break',
'bring',
'build',
'burn',
'buy',
'catch',
'choose',
'come',
'cost',
'cut',
'dig',
'dive',
'do',
'draw',
'dream',
'drive',
'drink',
'eat',
'fall',
'feel',
'fight',
'find',
'fly',
'forget',
'forgive',
'freeze',
'get',
'give',
'go',
'grow',
'hang',
'have',
'hear',
'hide',
'hit',
'hold',
'hurt',
'keep',
'know',
'lay',
'lead',
'leave',
'lend',
'let',
'lie',
'lose',
'make',
'mean',
'meet',
'pay',
'put',
'read',
'ride',
'ring',
'rise',
'run',
'say',
'see',
'sell',
'send',
'show',
'shut',
'sing',
'sit',
'sleep',
'speak',
'spend',
'stand',
'swim',
'take',
'teach',
'tear',
'tell',
'think',
'throw',
'understand',
'wake',
'wear',
'win',
'write']
sbj = random.choice(sbj)
v1 = random.choice(v1)
verb_debug = v1_debug(v1, sbj)
sen = ''
if sbj == 'I':
sen = sbj + 'am' + verb_debug
elif sbj == 'He' or 'She' or 'It':
sen = sbj + 'is' + verb_debug
elif sbj == 'You' or 'We' or 'They':
sen = sbj + 'are' + verb_debug
print(f'{sen}')
except NameError:
print('this is bullshit')
return
default_positive_form()

这是 Python 3.8

Answer 1

sen只有在不满足if/elif/elif块的任何条件的情况下，才会包含一个空字符串。将打印行更改为

print(f"sen is: {sen}")

但这不是真正的问题。obj != str不检查obj是否是字符串，它会检查对象是否指向类型常量str(感谢查尔斯·达菲的评论(。相反，请使用内置函数isinstance()如下所示：

if not isinstance(v1, str) and not isinstance(subject, str):
print("Variables are the wrong type!")
sys.exit()