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changed print functions to add support for python3. modified README.md #51

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changed print functions to add support for python3. modified README.md #51

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m-yosefpor Jul 11, 2019
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14 changes: 10 additions & 4 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,12 @@
latex2sympy parses LaTeX math expressions and converts it into the
equivalent SymPy form.

## Requirements
$ pip install antlr-python3-runtime #for python3

or

$ pip install antlr-python2-runtime #for python2
## Installation

[ANTLR](http://www.antlr.org/) is used to generate the parser:
Expand All @@ -13,12 +19,12 @@ $ antlr4 PS.g4 -o gen

## Usage

In Python 2.7:
In Python 2.7 or 3.7:

```python
from process_latex import process_sympy

process_sympy("\\frac{d}{dx} x^{2}")
process_sympy(r"\frac{d}{dx} x^{2}")
# => "diff(x**(2), x)"
```

Expand All @@ -27,10 +33,10 @@ process_sympy("\\frac{d}{dx} x^{2}")
|LaTeX|Image|Generated SymPy|
|-----|-----|---------------|
|`x^{3}`|![](https://latex.codecogs.com/gif.latex?%5CLARGE%20x%5E%7B3%7D)| `x**3`|
|`\frac{d}{dx} |t|x`|![](https://latex.codecogs.com/gif.latex?%5CLARGE%20%5Cfrac%7Bd%7D%7Bdx%7D%20%7Ct%7Cx)|`Derivative(x*Abs(t), x)`|
|`\frac{d}{dx} \|t\|x`|![](https://latex.codecogs.com/gif.latex?%5CLARGE%20%5Cfrac%7Bd%7D%7Bdx%7D%20%7Ct%7Cx)|`Derivative(x*Abs(t), x)`|
|`\sum_{i = 1}^{n} i`|![](https://latex.codecogs.com/gif.latex?%5CLARGE%20%5Csum_%7Bi%20%3D%201%7D%5E%7Bn%7D%20i)|`Sum(i, (i, 1, n))`|
|`\int_{a}^{b} \frac{dt}{t}`|![](https://latex.codecogs.com/gif.latex?%5CLARGE%20%5Cint_%7Ba%7D%5E%7Bb%7D%20%5Cfrac%7Bdt%7D%7Bt%7D)|`Integral(1/t, (t, a, b))`|
|`(2x^3 - x + z)|_{x=3}`|![](https://latex.codecogs.com/gif.latex?%5CLARGE%20%282x%5E3%20-%20x%20+%20z%29%7C_%7Bx%3D3%7D)|`z + 51`
|`(2x^3 - x + z)\|_{x=3}`|![](https://latex.codecogs.com/gif.latex?%5CLARGE%20%282x%5E3%20-%20x%20+%20z%29%7C_%7Bx%3D3%7D)|`z + 51`

## Contributing

Expand Down
33 changes: 17 additions & 16 deletions process_latex.py
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@@ -1,3 +1,4 @@
from __future__ import print_function
import sympy
import antlr4
from antlr4.error.ErrorListener import ErrorListener
Expand Down Expand Up @@ -497,22 +498,22 @@ def get_differential_var_str(text):
return text

def test_sympy():
print process_sympy("e^{(45 + 2)}")
print process_sympy("e + 5")
print process_sympy("5 + e")
print process_sympy("e")
print process_sympy("\\frac{dx}{dy} \\int y x^2 dy")
print process_sympy("\\frac{dx}{dy} 5")
print process_sympy("\\frac{d}{dx} \\int x^2 dx")
print process_sympy("\\frac{dx}{dy} \\int x^2 dx")
print process_sympy("\\frac{d}{dy} x^2 + x y = 0")
print process_sympy("\\frac{d}{dy} x^2 + x y = 2")
print process_sympy("\\frac{d x^3}{dy}")
print process_sympy("\\frac{d x^3}{dy} + x^3")
print process_sympy("\\int^{5x}_{2} x^2 dy")
print process_sympy("\\int_{5x}^{2} x^2 dx")
print process_sympy("\\int x^2 dx")
print process_sympy("2 4 5 - 2 3 1")
print(process_sympy("e^{(45 + 2)}"))
print(process_sympy("e + 5"))
print(process_sympy("5 + e"))
print(process_sympy("e"))
print(process_sympy("\\frac{dx}{dy} \\int y x^2 dy"))
print(process_sympy("\\frac{dx}{dy} 5"))
print(process_sympy("\\frac{d}{dx} \\int x^2 dx"))
print(process_sympy("\\frac{dx}{dy} \\int x^2 dx"))
print(process_sympy("\\frac{d}{dy} x^2 + x y = 0"))
print(process_sympy("\\frac{d}{dy} x^2 + x y = 2"))
print(process_sympy("\\frac{d x^3}{dy}"))
print(process_sympy("\\frac{d x^3}{dy} + x^3"))
print(process_sympy("\\int^{5x}_{2} x^2 dy"))
print(process_sympy("\\int_{5x}^{2} x^2 dx"))
print(process_sympy("\\int x^2 dx"))
print(process_sympy("2 4 5 - 2 3 1"))

if __name__ == "__main__":
test_sympy()