Python for Beginners –Cheat Sheet
Data types and Collections
i n t e g e r 10
f l o a t 3. 1 4
b o o l e a n Tru e / F a l s e
s t r i n g ‘a b c d e ’
l i s t [ 1, 2, 3 , 4 , 5 ]
t u p l e ( 1, 2, ‘ a’ , ‘ b ’ )
s e t { ‘a ’ , ’ b ’, ’c ’ }
d i c t i o n a ry { ‘a ’ :1 , ‘b ’ :2 }
Numerical Operators
+ad d i t i o n
-s ub t ra c ti o n
*mu l t i p l i c at i o n
/di v i s i o n
** exp o n e n t
%mod u l u s
// f lo o r d i vi s io n
Comparison Operators
<les s
<= l es s o r eq u al
>gre a t e r
>= g re a te r or eq u a l
== eq u a l
!= n ot eq u a l
Logical Operators
a n d l og i ca l AN D
or l og i ca l OR
no t l o gi c al N OT
Membership Operators
in v al u e i n o b je c t
n ot i n v al u e n o t i n o b je c t
Operations
S t r i n g s :
s[i ] i :t h it e m o f s
s [ - 1] l as t i t e m o f s
L i s t s :
l = [ ] d ef i ne e mp t y l i st
l [ i : j ] s li c e i n r a ng e i t o j
l [i ] = x re p l ac e i w i t h x
l [ i : j :k ] s li c e r a ng e i t o j, st e p k
D i c t i o n a ri e s :
d = { } c re a te e mp t y d i c ti o na r y
d[i ] r et r ie v e i t em w it h ke y i
d [ i ] = x s to r e x to k ey I
i i n d i s k ey i i n d i ct i on a ry
Index starts at 0
String Methods
s . s t r i p() r e m ov e tr a il i ng w hi t es p ac e
s . s p l i t ( x) r et u rn l is t , d el i m it e r x
s . j o i n (l) r et u rn s tr i ng , d e l im i te r s
s . s t a r t sw i t h ( x ) r et u rn T ru e i f s s ta r ts wi t h x
s . e n d s w i th ( x ) r et u rn T ru e i f s e nd s wi t h x
s . u p p e r () r et u rn c op y , u p pe r ca s e o n l y
s . l o w e r () re t u rn co p y , l ow e r ca s e o n ly
List Methods
l . a p p e n d ( x) a pp e nd x t o en d o f li s t
l .i n s er t ( I, x ) in s er t x a t p o si t io n i
l . r e m o v e (x ) r em o ve f ir s t o c cu r re n ce o f x
l . r e v er s e () r e ve r se l is t i n pl a ce
Dictionary Methods
d . k e y s () r et u rn s a l is t o f ke y s
d . v a l u e s () re t u rn s a l is t o f va l ue s
d . i t em s () r e tu r ns a l i s t o f ( ke y , v a lu e )
Conditional Statements
if co n d it i o n:
<co d e >
e l i f co n d it i o n :
<co d e >
e l s e :
<co d e >
Import from Module
f ro m mo d u le im p o rt f un c im p or t fu n c
f ro m mo d u le im p o rt f un c a s f i mp o rt f un c a s f
