opyum 0.2

Optimizing Python applications without mutilation code

# opyum

[](http://pypi.python.org/pypi/opyum)
[](http://pypi.python.org/pypi/opyum)
[](http://pypi.python.org/pypi/opyum)
[](http://pypi.python.org/pypi/opyum)
[](http://pypi.python.org/pypi/opyum)


## Description

**Optimizing Python applications without mutilation code.**

Use the automatic modification of AST for code optimization, which is transparent to the user and requires the addition of only a few lines.


## Usage

**Decorator**:

```python
from opyum import optimize

@optimize
def function_for_optimize():
...
```

**Import-hook**:

```python
import opyum
opyum.activate()

# other imports
```

**"With" syntax:**

```python
import opyum

with opyum.activate:
# other imports
```

**Command-line mode:**

Show optimized source:

$ opyum show myfile.py

Diff between original source and optimized source:

$ opyum diff myfile.py

Console diff (with "-c" or "--console" option):


Custom app diff (with "--app" option):


By default, html diff (without options):



## List of optimizations

####Constant folding

Before:

```python
x = 7 * 24 * 60 * 60
y = [i ** 2 for i in range(10) if i % 2 == 0]
z = sum(range(1000))
```

After:

```python
x = 604800
y = [0, 4, 16, 36, 64]
z = 499500
```

####"'Power' to 'multiplication'" optimization

Before:

```python
x1 = a ** (-2)
x2 = a ** (-1)
x3 = a ** ( 0)
x4 = a ** ( 1)
x5 = a ** ( 2)
```

After:

```python
x1 = 1 / (a * a)
x2 = 1 / a
x3 = 1
x4 = a
x5 = a * a
```

####"'Yield' to 'yield from'" optimization

Before:

```python
for x in some_expression:
yield x
```

After

```python
yield from some_expression
```

####Builtin constant propagation

Before:

```python
from math import pi
def circumference(r):
return 2 * pi * r
```

After:

```python
from math import pi
def circumference(r):
return 2 * 3.141592653589793 * r
```

####Custom constant propagation

Before:

```python
C_PI = 3.141592653589793

def circumference(r):
return 2 * C_PI * r
```

After:

```python
C_PI = 3.141592653589793

def circumference(r):
return 2 * 3.141592653589793 * r
```

####Dead code elimination

Before:

```python
def do_something():
return 1
print('returning 1')

if condition1:
pass
elif condition2:
do_something()
else:
pass
```

After:

```python
def do_something():
return 1

if not condition1 and condition2:
do_something()
```


## Installation

Installation is simple with pip:

$ pip install opyum

or with setuptools:

$ easy_install opyum


## Documentation

[opyum.readthedocs.org](http://opyum.readthedocs.org/)

[opyum.rtfd.org](http://opyum.rtfd.org/)