Python Beginner's Logic and if Statements and Usage in a Nutshell

Logical Judgments and Logical Statements

Whether something is right or wrong (a judgment of truth or falsehood) √ X
Doing different things based on the results of the judgment is our logical business
A judgment statement for which a condition is satisfied is a conditional statement
A logical statement is a combination of a conditional statement and a business statement

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If Statement Functions

Determine the truth of a proposition, if the proposition is true ( True ) then execute the if logic statement

If Statement Usage

Usage.

if bool_result: # Syntax blocks
	do # Business Code Blocks Note Indentation

Parameters.

bool_result:: Determine the truth or falsity of the result, Boolean type
do: execute any python code if bool_result is True

Return Value: if is a keyword and has no return value.

>>> insane_status = 'hunger
>>> if insane_status == 'hunger':
		print( 'xiaomu invites Insane to dinner' )
		
xiaomu invites Insane to dinner

real combat

# coding:utf-8

info = 'my name is insane'

info_list = ()
print(info_list)

if info_list[0] == 'insane':
    print(1)
    info_list[0] = 'loafer'

if info_list[1] == 'insane':
    print(2)
    info_list[1] = 'loafer'

if info_list[2] == 'insane':
    print(3)
    info_list[2] = 'loafer'

if info_list[-1] == 'insane':
    print(4)
    info_list[-1] = 'loafer'

print(info_list)
info = ' '.join(info_list)
print(info)

info = 'my name is insane, i am a pythoner, i love python'
info_list = ()

if info_list[0] in ['python', 'i']:
    info_list[0] = '*'

if info_list[1] == 'python' or info_list[1] == 'i':
    info_list[1] = '*'

if info_list[2] == 'python' or info_list[2] == 'i':
    info_list[2] = '*'

if info_list[3] == 'python' or info_list[3] == 'i':
    info_list[3] = '*'

if info_list[4] == 'python' or info_list[4] == 'i':
    info_list[4] = '*'

if info_list[5] == 'python' or info_list[5] == 'i':
    info_list[5] = '*'

if info_list[6] == 'python' or info_list[6] == 'i':
    info_list[6] = '*'

if info_list[7] == 'python' or info_list[7] == 'i':
    info_list[7] = '*'

if info_list[8] == 'python' or info_list[8] == 'i':
    info_list[8] = '*'

if info_list[9] == 'python' or info_list[9] == 'i':
    info_list[9] = '*'

if info_list[-1] in ['python', 'i']:
    info_list[-1] = '*'

print(info_list)
info = ' '.join(info_list)
print(info)

info = 'my name is insane'
print(len(info))

if len(info) > 10 and len(info) != 15:
    print(('insane', 'loafer'))

if len(info) > 10 and len(info) != 17:
    print(('name', 'iop'))

print('finish')

['my', 'name', 'is', 'insane']
4
['my', 'name', 'is', 'loafer']
my name is loafer
['my', 'name', 'is', 'insane,', '*', 'am', 'a', 'pythoner,', '*', 'love', '*']
my name is insane, * am a pythoner, * love *
17
my name is loafer
finish

Process finished with exit code 0

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