下面我们展示一个完整的Python代码示例,它使用正则表达式来判断用户输入的日期是否合法。 importredefis_valid_date(date_str):pattern=r'^\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$'returnre.match(pattern,date_str)isnotNone# 测试date_list=["2023-10-01","2023-02-29","2022...
# 导入datetime模块fromdatetimeimportdatetime# 将输入的日期字符串转换为datetime对象try:date_obj=datetime.strptime(date_str,'%Y-%m-%d')exceptValueError:print("输入的日期格式不正确,请重新输入") 1. 2. 3. 4. 5. 6. 7. 8. 步骤3:判断日期是否有效 # 判断日期是否有效defis_valid_date(date):try:...
given),installs all packages from Pipfile.Options:--system System pip management.[envvar:PIPENV_SYSTEM]-c,--codeTEXTInstall packages automatically discovered fromimportstatements.--deploy Abortifthe Pipfile.lock is out-of-date,or Python version is wrong.--site-packages/--no-site-packages Enable s...
simple is best！5、多行拼接 显示拼接行：两个及两个以上的物理行可用反斜杠（\）拼接为一个逻辑行。if 1900 < year < 2100 and 1 <= month <= 12 \and 1 <= day <= 31 and 0 <= hour < 24 \and 0 <= minute < 60 and 0 <= second < 60: # Looks like a valid datereturn 1 ...
calculate_hash()self.chain.append(new_block)defis_valid(self):foriinrange(1,len(self.chain)):current_block=self.chain[i]previous_block=self.chain[i-1]ifcurrent_block.hash!=current_block.calculate_hash():returnFalseifcurrent_block.previous_hash!=previous_block.hash:returnFalsereturnTrue4.测试...
is_valid(): # data = form_obj.cleaned_data() form_obj.save() msg = "保存成功" return render(request, "detail.html", locals()) else: # 全局钩子自定义错误提示获取 print(form_obj.errors.get('__all__')[0]) error_msg = form_obj.errors.get('__all__')[0] return render(request...
'daysInYear', 'daysTo', 'endOfDay', 'fromJulianDay', 'fromString', 'getDate', 'isLeapYear', 'isNull', 'isValid', 'longDayName', 'longMonthName', 'month', 'setDate', 'shortDayName', 'shortMonthName', 'startOfDay', 'toJulianDay', 'toPyDate', 'toString', 'weekNumber', 'year...
dateparserwill do its best to return a date, dealing with multiple formats and different locales. For that reason it is important that the input is a valid date, otherwise it could return false positives. To reduce the possibility of receiving false positives, make sure that: ...
特点PythonJavaC语言C++ 类型系统动态类型静态类型静态类型静态类型 语法简洁，强调缩进相对严格，使用大括号...
# Gather other propertiesprint("Is a symlink: ", os.path.islink(file_path))print("Absolute Path: ", os.path.abspath(file_path))print("File exists: ", os.path.exists(file_path))print("Parent directory: ", os.path.dirname(file_path))print("Parent directory: {} | File name: {}"....