types

basic types

• numbers: int, float, complex
• boolean: bool
• none!: NoneType, one constant has been defined for the only value it does take None

strings

• str

collections

• list: sample 1
• tuple: sample 1
• dict: sample 1
• set: sample 1

Operators

unary

description	name of method	usage	example
negation	(__neg__)	-self	-a , -1

description	name of method	usage	example
not	(__not__)	not self	not True

binary

description	name of method	usage	example
add	(__add__)	self + other	1 + 21 , "hello" + "world"
sub	(__sub__)	self - other	1 - 21 , {1, 2, 3, 4} - {1, 2}
div	(__div__)	self / other	1 / 21 , 102.1 / 2
mul	(__mul__)	self * other	1 * 21 , "ATCGC" * 10
mod	(__mod__)	self % other	100 % 2 , "Hello %s" % ("Jack")
floordiv	(__floordiv__)	self // other	1 // 21
pow	(__pow__)	self ** other	2 ** 10

description	name of method	usage	example
eq	(__eq__)	self == other	1 == 21, (1, 2) == (1, 2)
ne	(__ne__)	self != other	1 != 21
gt	(__gt__)	self > other	1 > 21
ge	(__ge__)	self >= other	1 >= 21
lt	(__lt__)	self < other	100 < 2
le	(__le__)	self <= other	1 <= 21

description	name of method	usage	example
and	(__and__)	self and other	True and True
or	(__or__)	self or other	True or False
is		self is other	a is b
is not		self is not other	a is not b
in	(__in__)	self in other	1 in [1, 2, 3, 4]

builtins

builtin functions

• print():
• type():

builtin types (cast type):

• int(), float(), complex(), str(), bool(), NoneType()
• list(), tuple(), dict(), set()
• range()

Questions

• BMI
• leap year
• stars
• factorial (desc), factorial (inc)