An example analysis of Python temperature Conversion

This paper mainly studies the relevant examples of Python language temperature conversion, which are as follows.

The code is as follows:

#TempConvert.py 
val=input(" Please enter the temperature value with a temperature representation symbol (for example: 32c ) ") 
if val[-1] in ["C","c"]: 
  f=1.8*float(val[0:-1])+32 
  print(" The temperature after conversion is: %.2fF"%f) 
elif val[-1] in ["F","f"]: 
  c=(float(val[0:-1])-32)/1.8 
  print(" The temperature after conversion is: %.2fC"%c) 
else: 
  print(" Input is wrong ")

Knowledge:

1. Comments: Single-line comments begin with # and multi-line comments begin and end with ''

2. Input: < variable > =input( < Suggestive text > ), the user's input is saved in the form of a string < variable > In the

3. The length of the string is L and the index value of the first byte is 0 or -ES21en; The last byte has an index value of ES22en-1 or -1

28 C eg. Val = ""

Then Val[-1] is the last character C;

The substring of the first two characters can be Val[0:2], which represents the interval from [0,2);

Val[0:-1] can be used to represent a string with the exception of the last character

4. Output: The print() function is used to output character information or the value of a variable in character form

The print() function selects the variable to output through %

5. Counting loop: for i in range( < count > )

< expression >

6. Please replace float() with eval() :eval(str)

The eval() function evaluates an expression as a string, for example:

>>>a=1         

>>>eval( " a+1 " )

2

>>>eval( ' pow(2,2)')

4

conclusion

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