A simple way to use conditional judgment statements in Python

The simplest conditional statement:

If expression:   expr_true_suite

As above, if is a keyword and expression is a conditional expression, conditional expressions support multiple conditional judgments, can be concatenated with Boolean operators and, or, and not, Expr_true_suite is a code block, expression is true, code block if only one row , the entire conditional statement above can be written to a single line, but with poor readability.
Conditional statements with Elif and else:

If expression1:   expr1_true_suiteelif expression2:   expr2_true_suiteelif expressionn:   exprn_true_ Suiteelse:   none_of_the_above_suite

As above, syntax is similar to conditional statements in other languages, and elif and else are optional.
Conditional expressions Implement ternary operators:
The three-dimensional operator is the following in C + + (e executes X at the time of creation, otherwise executes y)--

E? X:y

Ternary operators for Python simulations--

(E and [X] or [Y]) [0]

Implementation of the Python ternary operator--

X if E else Y

Take a look at some examples of judgments:

>>> if 1 < x < 2:   print (' True ')     

and represents and

or means >>> x 2 >>> if x = = 2 or x = = 3:   print (x)    

Returns a If B is true, otherwise returns C

A If B else c>>> ' True ' if 1 < x <2 els

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