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Python: Finding a (string) key in a dictionary that contains a substring,"[(k, v) for k, v in D.items() if 'Light' in k]"
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How do I use a MD5 hash (or other binary data) as a key name?,k = hashlib.md5('thecakeisalie').hexdigest()
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How to get only the last part of a path in Python?,os.path.basename(os.path.normpath('/folderA/folderB/folderC/folderD/'))
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Sorting datetime objects while ignoring the year?,"birthdays.sort(key=lambda d: (d.month, d.day))"
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How do I extract table data in pairs using BeautifulSoup?,[[td.findNext(text=True) for td in tr.findAll('td')] for tr in rows]
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"python: rstrip one exact string, respecting order","""""""Boat.txt.txt"""""".replace('.txt', '')"
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Python Pandas: How to get the row names from index of a dataframe?,list(df.index)
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Python Pandas: How to get the row names from index of a dataframe?,df.index
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List of all unique characters in a string?,""""""""""""".join(list(OrderedDict.fromkeys('aaabcabccd').keys()))"
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List of all unique characters in a string?,list(set('aaabcabccd'))
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List of all unique characters in a string?,""""""""""""".join(set('aaabcabccd'))"
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Find rows with non zero values in a subset of columns in pandas dataframe,"df.loc[(df.loc[:, (df.dtypes != object)] != 0).any(1)]"
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upload file with Python Mechanize,"br.form.add_file(open(filename), 'text/plain', filename)"
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Multiple 'in' operators in Python?,"all(word in d for word in ['somekey', 'someotherkey', 'somekeyggg'])"
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How to hide output of subprocess in Python 2.7,"subprocess.check_output(['espeak', text], stderr=subprocess.STDOUT)"
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How to replace NaNs by preceding values in pandas DataFrame?,"df.fillna(method='ffill', inplace=True)"
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How to create range of numbers in Python like in MATLAB,"print(np.linspace(1, 3, num=4, endpoint=False))"
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How to create range of numbers in Python like in MATLAB,"print(np.linspace(1, 3, num=5))"
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Symlinks on windows?,"kdll.CreateSymbolicLinkW('D:\\testdirLink', 'D:\\testdir', 1)"
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Python: slicing a multi-dimensional array,"slice = [arr[i][0:2] for i in range(0, 2)]"
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Upload files to Google cloud storage from appengine app,"upload_url = blobstore.create_upload_url('/upload', gs_bucket_name='my_bucket')"
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Change directory to the directory of a Python script,os.chdir(os.path.dirname(__file__))
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Call a function with argument list in python,func(*args)
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"Pandas DataFrame, how do i split a column into two","df['AB'].str.split(' ', 1, expand=True)"
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"Pandas DataFrame, how do i split a column into two","df['A'], df['B'] = df['AB'].str.split(' ', 1).str"
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Sorting Python list based on the length of the string,"print(sorted(xs, key=len))"
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Sorting Python list based on the length of the string,"xs.sort(lambda x, y: cmp(len(x), len(y)))"
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Sorting Python list based on the length of the string,xs.sort(key=lambda s: len(s))
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how to plot arbitrary markers on a pandas data series?,ts.plot(marker='.')
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get all combination of n binary value,"lst = list(itertools.product([0, 1], repeat=n))"
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get all combination of n binary value,"lst = map(list, itertools.product([0, 1], repeat=n))"
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get all combination of n binary value,"bin = [0, 1]
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[(x, y, z) for x in bin for y in bin for z in bin]"
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get all combination of n binary value,"lst = list(itertools.product([0, 1], repeat=3))"
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Append string to the start of each value in a said column of a pandas dataframe (elegantly),df['col'] = 'str' + df['col'].astype(str)
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How to get a variable name as a string in Python?,"dict((name, eval(name)) for name in ['some', 'list', 'of', 'vars'])"
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How to add a colorbar for a hist2d plot,"plt.colorbar(im, ax=ax)"
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How to get every element in a list of list of lists?,[a for c in Cards for b in c for a in b]
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Sorting dictionary keys in python,"sorted(d, key=d.get)"
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How to count the number of occurences of `None` in a list?,print(len([x for x in lst if x is not None]))
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Accessing dictionary by key in Django template,{{json.key1}}
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Get unique values from a list in python,mynewlist = list(myset)
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Get unique values from a list in python,"set(['a', 'b', 'c', 'd'])"
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Python: A4 size for a plot,"figure(figsize=(11.69, 8.27))"
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How to get everything after last slash in a URL?,"url.rsplit('/', 1)"
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How to get everything after last slash in a URL?,"url.rsplit('/', 1)[-1]"
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how to read a file in other directory in python,"x_file = open(os.path.join(direct, '5_1.txt'), 'r')"
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How to create a list with the characters of a string?,list('5+6')
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Flattening a list of NumPy arrays?,np.concatenate(input_list).ravel().tolist()
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Converting a dict into a list,print([y for x in list(dict.items()) for y in x])
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Converting a dict into a list,[y for x in list(dict.items()) for y in x]
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How to pull a random record using Django's ORM?,MyModel.objects.order_by('?').first()
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change current working directory in python,os.chdir('chapter3')
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change current working directory in python,os.chdir('C:\\Users\\username\\Desktop\\headfirstpython\\chapter3')
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change current working directory in python,os.chdir('.\\chapter3')
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How to create single Python dict from a list of dicts by summing values with common keys?,"dict((key, sum(d[key] for d in dictList)) for key in dictList[0])"
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How to sort pandas data frame using values from several columns?,"df.sort(['c1', 'c2'], ascending=[True, True])"
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Converting string series to float list,floats = [float(x) for x in s.split()]
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Converting string series to float list,"floats = map(float, s.split())"
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"How to set ""step"" on axis X in my figure in matplotlib python 2.6.6?","plt.xticks([1, 2, 3, 4, 5])"
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read from stdin,"for line in fileinput.input():
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pass"
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read from stdin,"for line in sys.stdin:
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pass"
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How to check if a value exists in a dictionary (python),'one' in list(d.values())
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How to check if a value exists in a dictionary (python),'one' in iter(d.values())
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Calling a parent class constructor from a child class in python,"super(Instructor, self).__init__(name, year)"
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how to create a dictionary using two lists in python?,"dict(zip(x, y))"
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Sorting a list of dicts by dict values,"sorted(a, key=lambda i: list(i.values())[0], reverse=True)"
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Sorting a list of dicts by dict values,"sorted(a, key=dict.values, reverse=True)"
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pandas: how to do multiple groupby-apply operations,"df.groupby(level=0).agg(['sum', 'count', 'std'])"
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How to add multiple values to a dictionary key in python?,"a.setdefault('somekey', []).append('bob')"
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Python - sum values in dictionary,sum(item['gold'] for item in example_list)
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Python - sum values in dictionary,sum([item['gold'] for item in example_list])
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Python - sum values in dictionary,sum(item['gold'] for item in myLIst)
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writing string to a file on a new line everytime?,f.write('text to write\n')
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writing string to a file on a new line everytime?,file.write('My String\n')
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Finding consecutive segments in a pandas data frame,df.reset_index().groupby('A')['index'].apply(np.array)
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Python - how to refer to relative paths of resources when working with code repository,"fn = os.path.join(os.path.dirname(__file__), 'my_file')"
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How to retrieve an element from a set without removing it?,e = next(iter(s))
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How to execute a command prompt command from python,os.system('dir c:\\')
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How to auto-scroll a gtk.scrolledwindow?,"self.treeview.connect('size-allocate', self.treeview_changed)"
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Python: Find in list,"3 in [1, 2, 3]"
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Convert date format python,"datetime.datetime.strptime('10/05/2012', '%d/%m/%Y').strftime('%Y-%m-%d')"
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python : how to convert string literal to raw string literal?,"s = s.replace('\\', '\\\\')"
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Get output of python script from within python script,print(proc.communicate()[0])
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Getting pandas dataframe from list of nested dictionaries,"pd.concat([pd.DataFrame(l) for l in my_list], axis=1).T"
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Delete Column in Pandas based on Condition,"df.loc[:, ((df != 0).any(axis=0))]"
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How to sort multidimensional array by column?,"sorted(a, key=lambda x: x[1])"
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string to list conversion in python,"[x.strip() for x in s.split(',')]"
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Get list item by attribute in Python,items = [item for item in container if item.attribute == value]
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Python: Write a list of tuples to a file,"open('filename', 'w').write('\n'.join('%s %s' % x for x in mylist))"
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Python regex to match multiple times,"pattern = re.compile('(?:review: )?(http://url.com/(\\d+))\\s?', re.IGNORECASE)"
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How do I read a text file into a string variable in Python,"str = open('very_Important.txt', 'r').read()"
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Grouping dataframes in pandas?,"df.groupby(['A', 'B'])['C'].unique()"
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read a file line by line into a list,"with open(fname) as f:
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content = f.readlines()"
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read a file line by line into a list,"with open('filename') as f:
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lines = f.readlines()"
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read a file line by line into a list,lines = [line.rstrip('\n') for line in open('filename')]
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