Java (2)¶

Here we look at common Python operations.

Strings in Python¶

Now let’s look at some common String operations in Python.

s = "Almost summer break"

s[:3]

'Alm'

s[4:7]

'st '

s.upper()

'ALMOST SUMMER BREAK'

s.lower()

'almost summer break'

array = s.split()

print(array)

['Almost', 'summer', 'break']

Lists in Python¶

alist = []
alist.append("Jeannie")
alist.append("Rohit")
alist.append("Lida")
alist.append("Steve")
alist.append("Dan")
alist.append("Sam")

print(alist)

['Jeannie', 'Rohit', 'Lida', 'Steve', 'Dan', 'Sam']

alist.insert(3, "Iris")

print(alist)

['Jeannie', 'Rohit', 'Lida', 'Iris', 'Steve', 'Dan', 'Sam']

alist[2]

'Lida'

alist[5] = "Steve"

print(alist)

['Jeannie', 'Rohit', 'Lida', 'Iris', 'Steve', 'Steve', 'Sam']

Dictionaries in Python¶

csCourses = dict()
csCourses[237] = "Computer Organization"
csCourses[134] = "Intro to Computer Science"
csCourses[136] = "Data Structures"
csCourses[256] = "Algorithms"

csCourses[237]

'Computer Organization'

csCourses.get(134)

'Intro to Computer Science'

134 in csCourses

True

361 in csCourses.keys()

False

"Data Structures" in csCourses.values()

True

Conditional Statements¶

a = 1 
b = 2
if a < b:
    print("a < b")

a < b

if a > b:
    print("a > b")
else:
    print("a < b")

a < b

c = 3
if a > b and a > c:
    print("a is largest")
elif b > a and b > c:
    print("b is largest")
else:
    print("c is largest")

c is largest