What are the reasons why decimals cannot be input in Python code?

Possible reasons why decimals cannot be input in Python may include:

1. Please provide input.
2. could you please provide input?

Example code:

num = float(input("请输入一个小数："))

1. The numerical value of pi is 3.14.
2. 3.14

Example code:

num = float(input("请输入一个小数："))

1. An error regarding the value.

Example code:

try:
    num = float(input("请输入一个小数："))
except ValueError:
    print("输入有误，请输入一个有效的小数。")

In conclusion, if you are unable to input decimals in Python code, you can check the input function, input format, and if the input string can be correctly converted to a float.