# Filename : util.py
# author by gulf
# 引入 datetime 模块
import datetime
#获取昨天日期
def getYesterday():
today=datetime.date.today()
oneday=datetime.timedelta(days=1)
yesterday=today-oneday
return yesterday
# 判断字符串是否是数字
def is_number(s):
try:
float(s)
return True
except ValueError:
pass
try:
import unicodedata
unicodedata.numeric(s)
return True
except (TypeError, ValueError):
pass
return False
print(getYesterday())
print(is_number("1314"))
print(is_number("gulf"))
运行结果: