判断结构

tang = 100
if tang > 200:
    print('OK')
print('test')

tang = 111
if tang > 200:
    print('200')
elif tang < 100:
    print('100')
else:
    print('100-200')

tang = [123,456,789]
if 123 in tang:
    print('ok')

tang = {'tang':123,'yudi':456}
if 'tang' in tang:
    print('ok')

P判断结构

四个空格等于一次tab；

if sth

    do

else do

if sth

    do

elif sth 否则

    do

else:  其他条件

    do

sth；

a in {}

a > num