Lists

Official Documentation

Creation

# Literal
xs = [ 1, 2, 3, 4, 5 ]

List comphrension

# Collect the names of persons
xs = [ person.age for person in people ]

# Collect the names of men
xs = [ person.age for person in people if person.male ]

# Nested loops
xs = [ (x, y) for x in range(1, 3) for y in range(1, 3) ]
# => [(1, 1), (1, 2), (2, 1), (2, 2)]

Operations

Syntax	Semantics
xs[i]	Read value at index i
xs[i] = y	Overwrite value at index i
len(xs)	Length of xs
xs[i:j]	Copy slice from i to j (exclusive)
xs[i:]	Copy slice from i to end
xs[:j]	Copy slice until i (exclusive)
xs.append(y)	Add y at the end of xs
xs.insert(i, y)	Insert y at index i
xs + ys	List concatenation
xs * n	List with n repetitions of xs
y in xs	Checks if y occurs in xs
del(xs[i])	Remove item with index i
xs.remove(y)	Remove first occurrence of y
xs.clear()	Empty list
xs.count(y)	Count number of occurrences of y
xs.reverse()	Reverses list in place
reversed(xs)	Reverses list as new sequence
xs.sort()	Sorts in place
xs.sort(key=func)	Sorts in place using func to determine order