示例4：使用格式化占位符和格式化选项：pi = 3.141592653589793 formatted_string = "Pi is approximately {:.2f} or {:.5f} decimal places.".format(pi, pi) print(formatted_string) # 输出：Pi is approximately 3.14 or 3.14159 decimal places.注意事项 在使用format函数时，有一些技巧和注意事项可...
# 输出'Left-aligned string: Lily '# 其他进制示例print("Binary: %b"%x)# 输出'Binary: 1010'print("Octal: %#o"%x)# 输出'Octal: 0o12'print("Hexadecimal: %#x"%x)# 输出'Hexadecimal: 0xa'# 字符串格式化拓展示例print("Value of x is {}, My name is {}, I am {} years old".forma...
这里使用了f-string(格式化字符串字面量),它是Python 3.6引入的一种新的字符串格式化方法,通过在字符串前加f来标识。 格式化指定 你还可以在占位符中指定值的格式化方式,比如控制浮点数的小数位数、整数的格式(二进制、八进制、十六进制等)、日期和时间的格式等。 python pi = 3.1415926 formatted_pi = "Pi to...
pi=3.14159formatted_pi="Pi value rounded to two decimal places is {:.2f}".format(pi)print(formatted_pi) 1. 2. 3. 输出结果为: Pi value rounded to two decimal places is 3.14 1. 使用f-string 控制格式 同样,f-string 也提供了类似的控制: formatted_pi=f"Pi value rounded to two decimal ...
"127" True Passed string True True Pure sweet Truth "True" False Vile contemptible lie False True So false it becomes true "123.456" True Decimal " -127 " True Spaces trimmed "\t\n12\r\n" True whitespace ignored "NaN" True Not a number ...
1. Using f-strings (Python 3.6+) The first method to format a number with commas and 2 decimal places in Python is by using the f-strings method. Here’s how you can use f-strings: number = 1234567.8910 formatted_number = f"{number:,.2f}" ...
❮ String Methods ExampleGet your own Python Server Insert the price inside the placeholder, the price should be in fixed point, two-decimal format: txt ="For only {price:.2f} dollars!" print(txt.format(price =49)) Try it Yourself » ...
valueA Python Object. formatA String value. It’s the ‘format’ we want to format the given value into. The following are legal values for format. '<'– Left aligns the result (within the available space) '>'– Right aligns the result (within the available space) ...
```python pi = 3.141592653589793 formatted_string = "Pi to two decimal places: {:.2f}".format(pi) print(formatted_string) # 输出: Pi to two decimal places: 3.14 ``` ### 总结 - **选择f-string**:如果你使用的是Python 3.6或更高版本,并且追求代码的简洁性和可读性,f-string通常是首选。
这样可能遗漏了这个库其他非常有用自己却没想到的功能(比如说我只知道JSON是一种API的文件ext,但不知道原来最初是JS的notation,又比如之前scraping只用string的一些method,现在知道了强大到如RE的库基本能match任何你想要的pattern),于是想完整的学习一些库:os, csv, request,beautifulsoup, datetime,regular expression,...