print("Current date and time: {:%Y-%m-%d %H:%M:%S}".format(now)) 4. 如何在字符串中插入百分号%? 在字符串中插入百分号%时,可以使用双百分号%%: percentage = 75 print(f"Completion rate: {percentage}%") print("Completion rate: {}%".format(
def to_percentage(value, decimal_places=2): percentage = round(value * 100, decimal_places) return f"{percentage:.{decimal_places}f}%" value = 0.12345 percentage = to_percentage(value) print(percentage) 在这段代码中,我们定义了一个名为to_percentage的函数,该函数接受一个值和一个小数位数参数,...
percentage = "{:.2f}%".format(value) # format the value to a string with 2 decimal places and append a "%" sign print(percentage) # output: 50.00% （2）使用f-string python value = 0.5 # 50% in decimal form percentage = f"{value:.2f}%" # format the value to a string with...
下面是一个示例: deffloat_to_percentage(num,decimal_places=2):return"{:.{}}%".format(num*100,decimal_places)num=0.25percentage=float_to_percentage(num,2)print(percentage) 1. 2. 3. 4. 5. 6. 输出结果为: 25.00% 1. 上述代码定义了一个名为float_to_percentage()的函数,该函数接受两个参数...
用string.format：>>> msg = 'hello world'>>> 'msg: {}'.format(msg)'msg: hello world'有了f-string后，可以简化成如下：>>> msg = 'hello world'>>> f'msg: {msg}''msg: hello world’可以看到，用fstring明显就清晰简化了很多，并且也更加具有可读性。fstring的一般用法如下：可以f或者F开头，...
>>> ratio = 0.9 >>> f"Over {ratio:.1%} of Pythonistas say 'Real Python rocks!'" "Over 90.0% of Pythonistas say 'Real Python rocks!'" >>> # Display percentage with 2 decimal places >>> f"Over {ratio:.2%} of Pythonistas say 'Real Python rocks!'" "Over 90.00% of Python...
2. 3. 这里{:.1%}表示输出为小数点后一位的百分比格式。 类图示例 在程序中,对象和类的设计是十分重要的。下面是有关数字格式化的一个简单类图示例,展示了不同的格式化策略。 NumberFormatter+format(float number, str format)+formatAsPercentage(float number, int decimalPlaces)DecimalFormatter+formatToDecimal...
In this tutorial, you’ll learn how to:Create integers and floating-point numbers Round numbers to a given number of decimal places Format and display numbers in stringsLet’s get started!Note: This tutorial is adapted from the chapter “Numbers and Math” in Python Basics: A Practical ...
The format function provides extensive options for number formatting including precision, alignment, and different number bases. number_formatting.py # Floating point precision print(format("Pi: {:.4f}", 3.1415926535)) # Pi: 3.1416 # Percentage print(format("Completion: {:.1%}", 0.756)) # ...
# Calculate percentage changes rounded to 2 decimal places percent_changes = np.round(stock_changes * 100, 2) print(f"Daily stock price changes: {percent_changes}%") # Output: Daily stock price changes: [ 8.23 -4.12 2.56 -1.87 4.95]% ...