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# -*- coding: utf-8 -*-
"""
github3.helpers
~~~~~~~~~~~~~~~~
This module provides various helper functions to the rest of the package.
"""
import inspect
from datetime import datetime
from dateutil.parser import parse as parse_datetime
def is_collection(obj):
"""Tests if an object is a collection."""
col = getattr(obj, '__getitem__', False)
val = False if (not col) else True
if isinstance(obj, basestring):
val = False
return val
def key_diff(source, update, pack=False):
"""Given two dictionaries, returns a list of the changed keys."""
source = dict(source)
update = dict(update)
changed = []
for (k, v) in source.items():
u_v = update.get(k)
if (v != u_v) and (u_v is not None):
changed.append(k)
if pack is False:
return changed
d = dict()
for k in changed:
d[k] = update[k]
return d
# from arc90/python-readability-api
def to_python(obj,
in_dict,
str_keys=None,
date_keys=None,
int_keys=None,
object_map=None,
list_map=None,
bool_keys=None, **kwargs):
"""Extends a given object for API Consumption.
:param obj: Object to extend.
:param in_dict: Dict to extract data from.
:param string_keys: List of in_dict keys that will be extracted as strings.
:param date_keys: List of in_dict keys that will be extrad as datetimes.
:param object_map: Dict of {key, obj} map, for nested object results.
"""
d = dict()
if str_keys:
for in_key in str_keys:
d[in_key] = in_dict.get(in_key)
if date_keys:
for in_key in date_keys:
in_date = in_dict.get(in_key)
try:
out_date = datetime.strptime(in_date, '%Y-%m-%dT%H:%M:%SZ')
except TypeError:
out_date = None
d[in_key] = out_date
if int_keys:
for in_key in int_keys:
if (in_dict is not None) and (in_dict.get(in_key) is not None):
d[in_key] = int(in_dict.get(in_key))
if bool_keys:
for in_key in bool_keys:
if in_dict.get(in_key) is not None:
d[in_key] = bool(in_dict.get(in_key))
if object_map:
for (k, v) in object_map.items():
if in_dict.get(k):
if v == 'self':
v = obj.__class__
d[k] = v.new_from_dict(in_dict.get(k))
if list_map:
for k, model in list_map.items():
nested_map = in_dict.get(k)
if nested_map:
if getattr(nested_map, 'items', False):
map_dict = {}
for nested_item, nested_dict in nested_map.items():
map_dict[nested_item] = model.new_from_dict(nested_dict)
d[k] = map_dict
else:
map_list = []
for item_map in nested_map:
map_list.append(model.new_from_dict(item_map))
d[k] = map_list
obj.__dict__.update(d)
obj.__dict__.update(kwargs)
# Save the dictionary, for write comparisons.
obj._cache = d
obj.__cache = in_dict
obj.post_map()
return obj
# from arc90/python-readability-api
def to_api(in_dict, int_keys=None, date_keys=None, bool_keys=None):
"""Extends a given object for API Production."""
# Cast all int_keys to int()
if int_keys:
for in_key in int_keys:
if (in_key in in_dict) and (in_dict.get(in_key, None) is not None):
in_dict[in_key] = int(in_dict[in_key])
# Cast all date_keys to datetime.isoformat
if date_keys:
for in_key in date_keys:
if (in_key in in_dict) and (in_dict.get(in_key, None) is not None):
_from = in_dict[in_key]
if isinstance(_from, basestring):
dtime = parse_datetime(_from)
elif isinstance(_from, datetime):
dtime = _from
in_dict[in_key] = dtime.isoformat()
elif (in_key in in_dict) and in_dict.get(in_key, None) is None:
del in_dict[in_key]
# Remove all Nones
for k, v in in_dict.items():
if v is None:
del in_dict[k]
return in_dict
# from kennethreitz/showme
def get_scope(f, args=None):
"""Get scope of given function for Exception scopes."""
if args is None:
args=list()
scope = inspect.getmodule(f).__name__
# guess that function is a method of it's class
try:
if f.func_name in dir(args[0].__class__):
scope += '.' + args[0].__class__.__name__
scope += '.' + f.__name__
else:
scope += '.' + f.__name__
except IndexError:
scope += '.' + f.__name__
# scrub readability.models namespace
scope = scope.replace('readability.api.', '')
return scope
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