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idcheck.py
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33 lines (28 loc) · 915 Bytes
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#!/usr/bin/env python
# coding:utf-8
'''
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黄哥Python培训 黄哥改写
Python 3
P111 页
string.letters 修改为 string.ascii_letters
'''
import string
alphas = string.ascii_letters + '_'
nums = string.digits
print('Welcome to the Identifier Checker v1.0')
print('Testees must be at least 2 chars long.')
myInput = input('Identifier to test? ')
if len(myInput) > 1:
if myInput[0] not in alphas:
print('''invalid: first symbol must be alphabetic''')
else:
for otherChar in myInput[1:]:
if otherChar not in alphas + nums:
print('''invalid: remaining symbols must be alphanumeric''')
break
else:
print("okay as an identifier")