python-Basic Knowledge

A variable and a simple data type

1. The variable name contains a letter/number/underscore and cannot begin with a number.

2. String processing: String single-cited double-cited can be;

A.title ()//capitalize the first letter of the word in string A;

A.upper ()//change the string to full capitalization;

A.lower ()//change the string to full lowercase;

A.rstrip ()//delete whitespace at the end of the string;

A.lstrip ()//delete whitespace at the beginning of the string;

A.rstrip ()//delete whitespace at both ends of the string;

The apostrophe is located between the two primers,

3. Digital

A. 3**2 expression of powers, 9;

B. The number of decimal places of floating-point numbers is uncertain;

>>> 0.1+1.3
1.4000000000000001
C. Change the integer type to a string;

STR (a)//the non-string is represented as a string;

D. 3/2 The result is 1, rounding only; 3.0/3 result is 1.5; at least one floating point

Two lists

python-Basic Knowledge