forked from justmarkham/DAT8
-
Notifications
You must be signed in to change notification settings - Fork 0
/
00_python_beginner_workshop.py
81 lines (57 loc) · 2.15 KB
/
00_python_beginner_workshop.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
'''
Python Beginner Workshop
'''
'''
Multi-line comments go between 3 quotation marks.
You can use single or double quotes.
'''
# One-line comments are preceded by the pound symbol
# BASIC DATA TYPES
x = 5 # creates an object
print type(x) # check the type: int (not declared explicitly)
type(x) # automatically prints
type(5) # assigning it to a variable is not required
type(5.0) # float
type('five') # str
type(True) # bool
# LISTS
nums = [5, 5.0, 'five'] # multiple data types
nums # print the list
type(nums) # check the type: list
len(nums) # check the length: 3
nums[0] # print first element
nums[0] = 6 # replace a list element
nums.append(7) # list 'method' that modifies the list
help(nums.append) # help on this method
help(nums) # help on a list object
nums.remove('five') # another list method
sorted(nums) # 'function' that does not modify the list
nums # it was not affected
nums = sorted(nums) # overwrite the original list
sorted(nums, reverse=True) # optional argument
# FUNCTIONS
def give_me_five(): # function definition ends with colon
return 5 # indentation required for function body
give_me_five() # prints the return value (5)
num = give_me_five() # assigns return value to a variable, doesn't print it
def calc(x, y, op): # three parameters (without any defaults)
if op == 'add': # conditional statement
return x + y
elif op == 'subtract':
return x - y
else:
print 'Valid operations: add, subtract'
calc(5, 3, 'add')
calc(5, 3, 'subtract')
calc(5, 3, 'multiply')
calc(5, 3)
# EXERCISE: Write a function that takes two parameters (hours and rate), and
# returns the total pay.
def compute_pay(hours, rate):
return hours * rate
compute_pay(40, 10.50)
# FOR LOOPS
# print each list element in uppercase
fruits = ['apple', 'banana', 'cherry']
for fruit in fruits:
print fruit.upper()