Python String Methods
| Action | Python Cheatsheet Code |
|---|
| Converts to uppercase | string.upper() |
| Converts to lowercase | string.lower() |
| Counts how many times x appears | string.count(x) |
| position of the x first occurence | string.find(x) |
| replaces x for y | string.replace(x,y) |
| returns a list of values delimited by x | string.strip(x) |
| returns a string with L values joined by string | string.join(L) |
| returns a string that includes formatted x | string.format(x) |
Python List Methods
| Action | Python Code |
|---|
| Adds x to the end of the list | list.append(x) |
| appends L to the end of the list | list.extend(L) |
| inserts x at i position | list.insert(i,x) |
| removes the first list item whose value is x | list.remove(x) |
| removes the item at position i and returns its value | list.pop(i) |
| removes all items from the list | list.clear() |
| returns a list of values delimited by x | list.index(x) |
| returns a string with list values joined by S | list.count(x) |
Python Built-in Functions
| Action | Python Code |
|---|
| Prints x objects separated by y | print(x, sep=’y’) |
| prints s and waits for an input that will be returned | input(s) |
| returns the length of x (s, L or D) | len(x) |
| returns the minimum value in L | min(L) |
| returns the maximum value in L | max(L) |
| returns the sum of the values in L | sum(L) |
| returns the absolute value of n | abs(n) |
| returns the n1 number rounded to n digits | round(n1, n) |
Python Dictionary Methods
| Action | Python Cheatsheet Code |
|---|
| returns a list of keys | dict.keys() |
| returns a list of values | dict.values() |
| returns a list of pairs | dict.items() |
| returns the value associtated to the keys k | dict.get(k) |
| Removes the item associated to the keys and returns its value | dict.pop() |
| adds keys-values to dictionary | dict.update(D) |
| removes all keys values from the dictionary | dict.clear() |
| returns a copy of the dictionary | dict.copy() |
Main data types
| Action | Python Code |
|---|
| boolean | True/False |
| integer | 10 |
| float | 10.01 |
| string | “123abc” |
| list | [value1, value2, …] |
| dictionary | {key1:value1, key2:value2, …} |
List Operations
| Action | Python Code |
|---|
| defines an empty list | list=[] |
| stores x with index i | list[i]=x |
| retrieves the item with index i | list[i] |
| retrieves last item | list[-1] |
| retrieves items in the range i to j | list[i:j] |
| removes the item with index i | del list[i] |
Numeric Operations
| Action | Python Cheatsheet Code |
|---|
| Addition | + |
| Subtraction | – |
| Multiplication | * |
| division | / |
| exponent | ** |
| Modules | % |
| Floor division | // |
Comparison Operations
| Action | Code |
|---|
| Equal | == |
| different | != |
| higher | > |
| lower | < |
| higher or equal | >= |
| lower or equal | <= |
Dictionary & Boolean Operations
| Action | Code |
|---|
| defines an empty dictionary | dict={} |
| stores x associated to keys k | dict[k] = x |
| retrieves the item with keys k | dict[k] |
| removes the item with keys k | del dict[k] |
| logical AND | and |
| logical OR | or |
| logical NOT | not |
Special Characters
| Action | Code |
|---|
| Coment | # |
| new line | \n |
| scape char | \ |
String Operations
| Action | Code |
|---|
| retrieves character at position i | string[i] |
| retieves last character | string[-1] |
| retrieves characters in range i to j | string[i:j] |
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Before you start using the Python Cheat sheet make sure you have properly installed Python. If you wish to know how to install Python Click here. This python Cheatsheet will enhance the python coding experience.
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