Python. Python is a general purpose programming language

Transcription

1 Python 250H

2 Python Python is a general purpose programming language

3 Python Python is a general purpose programming language Python is much closer to pseudocode then most languages

4 Python Python is a general purpose programming language Python is much closer to pseudocode then most languages Python has a lot of mathematical libraries which allow it to be used for scientific computing, symbolic math, testing proofs, ect.

5 Python Python is a general purpose programming language Python is much closer to pseudocode then most languages Python has a lot of mathematical libraries which allow it to be used for scientific computing, symbolic math, testing proofs, ect. We recommend using Python for any programming projects You are not required to You can use Python or Java

6 Basic Math +, -, *, / Normal addition, subtraction, multiplication, division

7 Basic Math +, -, *, / Normal addition, subtraction, multiplication, division // Floor division

8 Basic Math +, -, *, / Normal addition, subtraction, multiplication, division // Floor division % Mod or Remainder

9 Basic Math +, -, *, / Normal addition, subtraction, multiplication, division // Floor division % Mod or Remainder ** Calculate powers

10 Math Module math.ceil(x) Ceiling Function math.comb(n, k) n choose k math.factorial(x) Factorial math.floor(x) Floor

11 Math Module math.ceil(x) Ceiling Function math.comb(n, k) n choose k math.factorial(x) Factorial math.floor(x) Floor math.perm(n, k) Permutation math.sqrt(x) Square Root math.pi π constant math.e e constant

12 Strings # comment Comment

13 Strings # comment Comment String String Quotes tell python what is inside is a string Double quotes and single quotes do the same thing in Python

14 Strings # comment Comment String String Quotes tell python what is inside is a string Double quotes and single quotes do the same thing in Python print() The print() function produces a more readable output, by omitting the enclosing quotes and by printing escaped and special characters

15 Lists Lists work almost exactly like arrays in Java

16 Lists Lists work almost exactly like arrays in Java list = [] Creates an empty list called list

17 Lists Lists work almost exactly like arrays in Java list = [] Creates an empty list called list list = [1, 2, 3, 4, 5] list[0] #returns 1 list[-1] #returns 5 list.append(6) #adds 6 to the list after 5 len(list) #returns length of the list

18 Conditions Equals: a == b Not Equals: a!= b Less than: a < b Less than or equal to: a <= b Greater than: a > b Greater than or equal to: a >= b

19 Conditions Equals: a == b Not Equals: a!= b Less than: a < b Less than or equal to: a <= b Greater than: a > b Greater than or equal to: a >= b And: and Or: or True: true False: false Not: not

20 If Statements if condition: Tabs in Python matter!!!!!!!!

21 If Statements if condition: if condition: else: Tabs in Python matter!!!!!!!!

22 If Statements if condition: if condition: else: if condition: elif condition: else: Tabs in Python matter!!!!!!!!

23 Loops list = [1, 2, 3, 4, 5, 6] for x in list:

24 Loops list = [1, 2, 3, 4, 5, 6] for x in list: for x in range(6):

25 Loops list = [1, 2, 3, 4, 5, 6] for x in list: for x in range(6): Note that range(6) is not the values of 0 to 6, but the values 0 to 5

26 Loops list = [1, 2, 3, 4, 5, 6] for x in list: for x in range(6): Note that range(6) is not the values of 0 to 6, but the values 0 to 5 range(2, 6) means values from 2 to 6 (but not including 6)

27 Loops list = [1, 2, 3, 4, 5, 6] for x in list: for x in range(6): Note that range(6) is not the values of 0 to 6, but the values 0 to 5 range(2, 6) means values from 2 to 6 (but not including 6) range(2, 30, 3) means values from 2 to 30 but will add by 3 2, 5, 8, 11, 14, 17, 20, 23, 26, 29

28 Loops list = [1, 2, 3, 4, 5, 6] for x in list: for x in range(6): Note that range(6) is not the values of 0 to 6, but the values 0 to 5 range(2, 6) means values from 2 to 6 (but not including 6) range(2, 30, 3) means values from 2 to 30 but will add by 3 2, 5, 8, 11, 14, 17, 20, 23, 26, 29 while condition:

29 Functions def foo():

30 Functions def foo(): To call the function you only have to use the name of the function with parentheses foo()

31 Functions def foo(): To call the function you only have to use the name of the function with parentheses foo() def bar(arg1, arg2):

32 Functions def foo(): To call the function you only have to use the name of the function with parentheses foo() def bar(arg1, arg2): To call the function with arguments you just add the arguments inside the parentheses bar(a,b)

33 Main Method if name == main Creates a main method

34 Main Method if name == main Creates a main method def foo(): def bar(arg1): if name == main : bar(foo())

35 Helpful Links Python documentation Examples and Tutorials Examples and Tutorials