The Python Mega Course: Build 10 Real World Applications
Summary: Integers, Floats, Lists, Dictionaries, Tuples, dir, help
In this section you learned that:
- Integers are for representing whole numbers:
- rank = 10
- eggs = 12
- people = 3
- Floats represent continuous values:
- temperature = 10.2
- rainfall = 5.98
- elevation = 1031.88
- Strings represent any text:
- message = “Welcome to our online shop!”
- name = “John”
- serial = “R001991981SW”
- Lists represent arrays of values that may change during the course of the program:
- members = [“Sim Soony”, “Marry Roundknee”, “Jack Corridor”]
- pixel_values = [252, 251, 251, 253, 250, 248, 247]
- Dictionaries represent pairs of keys and values:
- phone_numbers = {“John Smith”: “+37682929928”, “Marry Simpons”: “+423998200919”}
- volcano_elevations = {“Glacier Peak”: 3213.9, “Rainer”: 4392.1}
- Keys of a dictionary can be extracted with:
- phone_numbers.keys()
- Values of a dictionary can be extracted with:
- phone_numbers.values()
- Tuples represent arrays of values that are not to be changed during the course of the program:
- vowels = (‘a’, ‘e’, ‘i’, ‘o’, ‘u’)
- one_digits = (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
- To find out what attributes a type has:
- dir(str)
- dir(list)
- dir(dict)
- To find out what Python builtin functions there are:
- dir(__builtins__)
- Documentation for a Python command can be found with:
- help(str)
- help(str.replace)
- help(dict.values)
