str_num = locale.currency(num, grouping=True) print(str_num) # 输出: "$12,345.68" 2. 保留特定位数的小数 可以使用格式化字符串来控制小数点后的位数。例如,保留两位小数: 示例代码: num = 123.456 str_num = "{:.2f}".format(num) print(str_num) # 输出: "123.46" 或者使用f-string: num =...
='USD':amount/=self.rates[from_currency]# 转换目标货币amount*=self.rates[to_currency]returnamountif__name__=="__main__":converter=CurrencyConverter()amount=float(input("请输入金额: "))from_currency=input("请输入源货币 (如: USD, EUR, CNY): ")to_currency=input("请输入目标货币 (如: ...
timestamp from prices WHERE first_leg=’{}’ and second_leg=’USD’ and timestamp> ‘1520408341.52’”.format(currency) cursor.execute(query) rows = cursor.fetchone() return rows[0], rows[1]
self.geometry("500x200") # Label self.intro_label = Label(self, text = 'Welcome to Real Time Currency Convertor', fg = 'blue', relief = tk.RAISED, borderwidth = 3) self.intro_label.config(font = ('Courier',15,'bold')) self.date_label = Label(self, text = f"1 CNY = {self....
在Python的编程中,经常会涉及到字符串与list之间的转换问题,下面就将两者之间的转换做一个梳理。 1、list转换成字符串 命令:list() 例子: 2、字符串转换成list 命令:"".join(list) 其中,引号中是字符之间的分割符,如“,”,“;”,“\t”等等
format("Centered string") '===Centered string===' In the first example, you use the :.2f format specifier. This specifier tells .format() to format the input value as a floating-point number with a precision of two. This way, you can represent currency values.In the second...
formatted_currency = locale.currency(123456.789, symbol=True, grouping=True) print(formatted_currency) # 输出:￥123,456.79 LC_*常量 locale模块中定义了一些常量,用于表示不同的本地化类别。例如,LC_TIME表示时间格式,LC_NUMERIC表示数字格式,LC_MONETARY表示货币格式,LC_COLLATE表示排序方式等。可以使用这些常量...
formatted_currency = locale.format_string("%s%.*f", (conv['currency_symbol'], conv['frac_digits'], number), grouping=True)# 打印格式化后的货币 print(formatted_currency) # 输出：'￥1,234,567.80'输出 1,234,567 ¥1,234,567.80 解释 这段代码使用了Python的locale模块，这个模块提供了一...
In this tutorial, you'll learn about the main tools for string formatting in Python, as well as their strengths and weaknesses. These tools include f-strings, the .format() method, and the modulo operator.
locale模块在Python中用于本地化处理，提供格式化和转换本地化数据的函数和常量。常用函数如：setlocale()设置本地化参数，format_string()格式化数字为字符串，strcoll()比较字符串的本地化排序，atof()将字符串转换为浮点数，currency()格式化数字为货币形式。locale模块定义了常量表示不同本地化类别，如...