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Posted : admin | On 22-05-2021

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Almost every project needs to communicate with the outside world. If youʼre working with JavaScript frameworks, you'll most likely use Fetch API to do that. But when you're working with the API, do you remember the syntax by heart or do you need a little help? Python 3 Cheat Sheet by Finxter This well-crafted, handpicked, free Python cheat sheet makes your life much easier. Print it and pin it to your wall - until you know all the basics by heart. Python is a flexible programming language that has become increasingly popular in the past few years. This cheat sheet is designed to give you a handy resource for common Python data types, Python operators, and Python functions. It includes Python data types, operators, special characters, f-strings, and functions for working with robots.

MATLAB–Python–Julia cheatsheet

Dependencies and Setup¶

In the Python code we assume that you have already run importnumpyasnp

In the Julia, we assume you are using v1.0.2 or later with Compat v1.3.0 or later and have run usingLinearAlgebra,Statistics,Compat

Creating Vectors¶

Operation	MATLAB	Python
Row vector: size (1, n)
Column vector: size (n, 1)
1d array: size (n, )	Not possible	or
Integers from j to n withstep size k
Linearly spaced vectorof k points

Creating Matrices¶

Operation	MATLAB	Python	Julia
Create a matrix
2 x 2 matrix of zeros
2 x 2 matrix of ones
2 x 2 identity matrix
Diagonal matrix
Uniform random numbers
Normal random numbers
Sparse Matrices
Tridiagonal Matrices

Manipulating Vectors and Matrices¶

Operation	MATLAB	Python
Transpose
Complex conjugate transpose(Adjoint)
Concatenate horizontally	or	or
Concatenate vertically	or	or
Reshape (to 5 rows, 2 columns)
Convert matrix to vector
Flip left/right
Flip up/down
Repeat matrix (3 times in therow dimension, 4 times in thecolumn dimension)
Preallocating/Similar	N/A similar type
Broadcast a function over acollection/matrix/vector	Functions broadcast directly	Functions broadcast directly

Accessing Vector/Matrix Elements¶

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Operation	MATLAB	Python	Julia
Access one element
Access specific rows
Access specific columns
Remove a row
Diagonals of matrix
Get dimensions of matrix

Mathematical Operations¶

Operation	MATLAB	Python
Dot product
Matrix multiplication
Inplace matrix multiplication	Not possible
Element-wise multiplication
Matrix to a power
Matrix to a power, elementwise
Inverse	or	or
Determinant
Eigenvalues and eigenvectors
Euclidean norm
Solve linear system(Ax=b) (when (A)is square)
Solve least squares problem(Ax=b) (when (A)is rectangular)

Sum / max / min¶

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Operation	MATLAB	Python	Julia
Sum / max / min ofeach column
Sum / max / min of each row
Sum / max / min ofentire matrix
Cumulative sum / max / minby row
Cumulative sum / max / minby column

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Programming¶

Operation	MATLAB	Python	Julia
Comment one line
Comment block
For loop
While loop
If
If / else
Print text and variable
Function: anonymous
Function
Tuples	Can use cells but watch performance
Named Tuples/Anonymous Structures
Closures
Inplace Modification	No consistent or simple syntaxto achieve this

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We use Python because Python Programming language can be close to pseudo-code which is extremely versatile and popular among developers. Python is called General Purpose language (GPL) because it is used in Machine Learning, GUI development, software development, Data Science, and many more. It is a very human-readable programming language for those with an understanding of English. It allows for easy comprehension because Python supports various types of object-oriented programming and objects.

Python is considered a multi-paradigm language that allows programmers to use the most acceptable style to complete a project. The Python cheatsheet provides a great deal of promise to those who want to start coding. It is also uselful while being a decent option for those who want to pick up an additional programming language. Learning Python’s core concepts and computer programming can offer you both as a user and as a developer. It helps to understand how programs function works while also conveying simple reasoning that can support you in other fields.

Python is widely considered as the preferred language for Artificial Intelligence. Python helps developers be productive and confident about the software they’re building from development to deployment and maintenance. Access to great libraries and frameworks for AI and a wide community are the main reasons of python being used in the field of Artificial Intelligence. Python AI Community has grown gradually across the globe. Scientific Python packages such as Numpy, Scipy, and Matplotlib can be installed in a program running on Python. Apart from Python, Matlab & R are also used.

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Python is the most popular general-purpose, high-level programming language which was created in 1991 by Guido van Rossum. It was developed by Python Software Foundation with the goal of concentrating on the readability of code with its extensive use of white space. Development team was inspired by the British comedy group Monty Python to make a programming language that was fun to use. Python was named after the BBC show “Monty Python’s Flying Circus” as he was a big fan of the TV show.

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