seanh

#!/usr/bin/env python
"""
Recursively checks that no filenames from the current working directory 
down are the same, even if they are in different subdirectories. Exits 
with status 0 if no matching filenames are found, or 1 if a match is 
found.

"""
import sys,os
print "Checking for filename clashes...",

seanh

def addCollideMask(np,mask):
    """Add mask to the NodePath's existing collide mask (do a binary OR of
    the two bitmasks)."""
    np.setCollideMask(np.getCollideMask() | mask)
 
def removeCollideMask(np,mask):
    """Remove mask from the NodePath's existing collide mask (all bits set
to 1 in mask will be set to 0 in the NodePath's mask)."""
    # Need to copy mask first to avoid modifying it in place.
    copy = mask & BitMask32.allOn()

seanh

# BitMask32 is a class for creating and combining binary bitmasks.

In [5]: BitMask32.allOff()
Out[5]:  0000 0000 0000 0000 0000 0000 0000 0000

In [6]: BitMask32.bit(1)
Out[6]:  0000 0000 0000 0000 0000 0000 0000 0010

In [7]: BitMask32.bit(0)
Out[7]:  0000 0000 0000 0000 0000 0000 0000 0001

seanh

"""This is done with the os module, which has lots of methods for handling files and dirs.

<http://docs.python.org/lib/os-file-dir.html>

Effbot's page on the os module: <http://effbot.org/librarybook/os.htm>

The shutil module is useful here also: <http://docs.python.org/lib/module-shutil.html>

"""
import os

seanh

"""How to create a custom mappable container (dictionary-like) type in Python."""

from UserDict import DictMixin

class MyDict(DictMixin):
    # MyDict only needs to implement getitem, setitem, delitem and keys (at a 
    # minimum) and UserDict will provide the rest of the standard dictionary
    # methods based on these four.
    #
    # getitem and delitem should raise KeyError if no item exists for the given

seanh

"""
[date], [datetime] and [time] objects in Python have a [strftime] method for creating string representations in whatever format you want. (See the strftime link for the strftime syntax.)

[date]: http://docs.python.org/library/datetime.html#datetime.date
[datetime]: http://docs.python.org/library/datetime.html#datetime.datetime
[time]: http://docs.python.org/library/datetime.html#datetime.time
[strftime]: http://docs.python.org/library/datetime.html#strftime-behavior

"""
def format_date_numerical(date):

seanh

"""When you want to import a python file but that file is not in the same directory as the python file you're importing from (e.g. it's in a subdir). You need to add the directory that contains the file you want to import to your path environment variable sys.path. sys.path contains all the places python will look for a file when you do an import."""

import sys
sys.path.append('./markdown-1.7')
from markdown import Markdown

seanh

# See <http://docs.python.org/ref/sequence-types.html>
#
# For a sequence, the allowable keys should be the integers k for which 
# 0 <= k < N where N is the length of the sequence, or slice objects, 
# which define a range of items.

class MySequence:

    def __len__(self):
        """Called to implement the built-in function len(). Should 

seanh

# http://www.diveintopython.org/file_handling/os_module.html

# Use a one-line list comprehension to get all the files in a given directory with a given extension.
import os
dir = '.'
ext = '.txt'
txt_files = [f for f in os.listdir(dir) if os.path.isfile(os.path.join(dir,f)) and f.endswith(ext)]

# os.path.join joins a directory and a filename into a path. You can also split a path name into directory and file with 
# os.path.split(), and you can split a filename with extension into filename and extension with os.path.splitext()

seanh

# Write mode creates a new file or overwrites the existing content of the file. 
# Write mode will _always_ destroy the existing contents of a file.
try:
    # This will create a new file or **overwrite an existing file**.
    f = open("file.txt", "w")
    try:
        f.write('blah') # Write a string to a file
        f.writelines(lines) # Write a sequence of strings to a file
    finally:
        f.close()