python之为什么我会收到 TypeError : can't multiply sequence by non-int of type 'float'

我正在尝试执行我在 John Zelle 的 Python 编程:计算机科学导论 中找到的这个示例 Python 脚本:

# File: chaos.py 
# A simple program illustrating chatic behavior 
 
def main(): 
    print("This program illustrates a chaotic function") 
    x = input("Enter a number between 0 and 1: ") 
    for i in range(10): 
        x = 3.9 * x * (1 - x) 
        print(x) 
 
main() 

...但出于某种原因，我不断收到此错误:

Traceback (most recent call last): 
  File "C:\...\chaos.py", line 11, in <module> 
    main() 
  File "C:\...\chaos.py", line 8, in main 
    x = 3.9 * x * (1 - x) 
TypeError: can't multiply sequence by non-int of type 'float' 

我不知道如何解决这个问题。有什么建议吗？

请您参考如下方法:

input() 默认返回一个字符串。在使用它之前，您必须将其转换为 float。

这是 documentation (看起来你正在使用 Python 3.x)

If the prompt argument is present, it is written to standard output without a trailing newline. The function then reads a line from input, converts it to a string (stripping a trailing newline), and returns that. When EOF is read, EOFError is raised.

罪魁祸首是:

x = input("Enter a number between 0 and 1: ") 

尝试

x = input("Enter a number between 0 and 1: ") 
x = float(x)