List of articles

• One 、 Transformation requirements analysis
• Two 、 Transformation implementation

One 、 Transformation requirements analysis

example ： Give a string , Convert to floating point （float）

Demand analysis ：
First , The string must be numeric
secondly , You need to convert this string to a floating point number , You need to use float function

Two 、 Transformation implementation

For the ：
Defined function , Floating point number conversion , And return this floating point number
Call the defined function , Pass in a string , Print the converted type data

The code is as follows （ Example ）：

def str_to_float(str):
return float(str)
if __name__ == '__main__':
str = "2.999"
num = str_to_float(str)
print(num)
print(type(num))

Return results ：