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best way to strip punctuation from a string in python,"s.translate(None, string.punctuation)" |
how to parse dates with -0400 timezone string in python?,"datetime.strptime('2009/05/13 19:19:30 -0400', '%Y/%m/%d %H:%M:%S %z')" |
sum a list of numbers in python,sum(Decimal(i) for i in a) |
pandas for duplicating one line to fill dataframe,newsampledata.reindex(newsampledata.index.repeat(n)).reset_index(drop=True) |
adding a string to a list,b.append(c) |
pandas: best way to select all columns starting with x,df.columns.map(lambda x: x.startswith('foo')) |
how to clip polar plot in pylab/pyplot,plt.show() |
is it possible to tune parameters with grid search for custom kernels in scikit-learn?,"model.fit(X_train, y_train)" |
how to make a log log histogram in python,plt.show() |
how do you get the current text contents of a qcombobox?,text = str(combobox1.currentText()) |
how to make python format floats with certain amount of significant digits?,"""""""{0:.6g}"""""".format(3.539)" |
is there a way to suppress printing that is done within a unit test?,unittest.main() |
python: how to sort a list of dictionaries by several values?,"sorted(A, key=itemgetter('name', 'age'))" |
"in python, how to display current time in readable format","time.strftime('%l:%M%p %z on %b %d, %Y')" |
"extract elements at indices (1, 2, 5) from a list `a`","[a[i] for i in (1, 2, 5)]" |
for loop in python,"list(range(1, 11))" |
how to extract tuple values in pandas dataframe for use of matplotlib?,"pd.pivot(index=df['B1'], columns=df.index, values=df['B2']).plot()" |
count the number of true values associated with key 'success' in dictionary `d`,sum(1 if d['success'] else 0 for d in s) |
how do i read the first line of a string?,"my_string.split('\n', 1)[0]" |
creating link to an url of flask app in jinja2 template,"{{url_for('static', filename='[filenameofstaticfile]')}}" |
how do i set permissions (attributes) on a file in a zip file using python's zipfile module?,"zipfile.writestr(zipinfo, '')" |
how to get a list of all integer points in an n-dimensional cube using python?,"list(itertools.product(list(range(-x, y)), repeat=dim))" |
"how do i modify a single character in a string, in python?",print(''.join(a)) |
convert binary string '01010101111' to integer,"int('01010101111', 2)" |
a list as a key for pyspark's reducebykey,"rdd.map(lambda k_v: (set(k_v[0]), k_v[1])).groupByKey().collect()" |
python - differences between elements of a list,"[(j - i) for i, j in zip(t[:-1], t[1:])]" |
rearrange tuple of tuples in python,tuple(zip(*t)) |
taking the results of a bash command and using it in python,os.system('top -d 30 | grep %d > test.txt' % pid) |
how to unpack a dictionary of list (of dictionaries!) and return as grouped tuples?,"[('A', 1, 2), ('B', 3, 4)]" |
how do i print the content of a .txt file in python?,f.close() |
remove a specific column in numpy,"np.delete(a, [1, 3], axis=1)" |
django-piston: how can i get app_label + model_name?,instance.__class__.__name__ |
"histogram in matplotlib, time on x-axis",ax.xaxis.set_major_formatter(mdates.DateFormatter('%d.%m.%y')) |
setting path to firefox binary on windows with selenium webdriver,driver = webdriver.Firefox() |
pandas remove column by index,"df = df.ix[:, 0:2]" |
rename index of a pandas dataframe,"df.ix['c', '3']" |
django - filter queryset by charfield value length,MyModel.objects.filter(text__regex='^.{254}.*') |
get keys and items of dictionary `d` as a list,list(d.items()) |
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] |
"extracting a region from an image using slicing in python, opencv","cv2.cvtColor(img, cv2.COLOR_BGR2RGB)" |
how to save pandas pie plot to a file,fig.savefig('~/Desktop/myplot.pdf') |
convert a list of strings to either int or float,[(float(i) if '.' in i else int(i)) for i in s] |
remove a level from a pandas multiindex,MultiIndex.from_tuples(index_3levels.droplevel('l3').unique()) |
python: how do i use itertools?,"list(itertools.product(list(range(2)), repeat=3))" |
is there a way to split a string by every nth separator in python?,"print(['-'.join(words[i:i + span]) for i in range(0, len(words), span)])" |
pandas subtract a row from dataframe `df2` from dataframe `df`,"pd.DataFrame(df.values - df2.values, columns=df.columns)" |
how can i get dict from sqlite query?,cur.execute('select 1 as a') |
correct code to remove the vowels from a string in python,""""""""""""".join([l for l in c if l not in vowels])" |
compare two columns using pandas,df2 = df.astype(float) |
how to create matplotlib colormap that treats one value specially?,plt.show() |
get last day of the first month in year 2000,"(datetime.date(2000, 2, 1) - datetime.timedelta(days=1))" |
combining rows in pandas,df.reset_index().groupby('city_id').sum() |
pandas + dataframe - select by partial string,df[df['A'].str.contains('hello')] |
how to get full path of current file's directory in python?,os.path.dirname(os.path.abspath(__file__)) |
additional empty elements when splitting a string with re.split,"re.findall('\\w+="".*?""', comp)" |
how do you select choices in a form using python?,form['favorite_cheese'] = ['brie'] |
get a list of all the duplicate items in dataframe `df` using pandas,"pd.concat(g for _, g in df.groupby('ID') if len(g) > 1)" |
"how to get files in a directory, including all subdirectories","print(os.path.join(dirpath, filename))" |
fastest way to count number of occurrences in a python list,"Counter({'1': 6, '2': 4, '7': 3, '10': 2})" |
python : how to remove duplicate lists in a list of list?,b.sort(key=lambda x: a.index(x)) |
lambda in python,"f = lambda x, y: x + y" |
technique to remove common words(and their plural versions) from a string,"'all', 'just', 'being', 'over', 'both', 'through', 'yourselves', 'its', 'before', 'herself', 'had', 'should', 'to', 'only', 'under', 'ours', 'has', 'do', 'them', 'his', 'very', 'they', 'not', 'during', 'now', 'him', 'nor', 'did', 'this', 'she', 'each', 'further', 'where', 'few', 'because', 'doing', 'some', 'are', 'our', 'ourselves', 'out', 'what', 'for', 'while', 'does', 'above', 'between', 't', 'be', 'we', 'who', 'were', 'here', 'hers', 'by', 'on', 'about', 'of', 'against', 's', 'or', 'own', 'into', 'yourself', 'down', 'your', 'from', 'her', 'their', 'there', 'been', 'whom', 'too', 'themselves', 'was', 'until', 'more', 'himself', 'that', 'but', 'don', 'with', 'than', 'those', 'he', 'me', 'myself', 'these', 'up', 'will', 'below', 'can', 'theirs', 'my', 'and', 'then', 'is', 'am', 'it', 'an', 'as', 'itself', 'at', 'have', 'in', 'any', 'if', 'again', 'no', 'when', 'same', 'how', 'other', 'which', 'you', 'after', 'most', 'such', 'why', 'a', 'off', 'i', 'yours', 'so', 'the', 'having', 'once'" |
heap sort: how to sort?,sort() |
how to write unicode strings into a file?,f.write(s) |
create a regular expression object with a pattern that will match nothing,re.compile('a^') |
how can i order a list of connections,"[4, 6, 5, 3, 7, 8], [1, 2]" |
"plotting within a for loop, with 'hold on' effect in matplotlib?",plt.show() |
create new column `a_perc` in dataframe `df` with row values equal to the value in column `a` divided by the value in column `sum`,df['A_perc'] = df['A'] / df['sum'] |
creating an empty list,list() |
converting from a string to boolean in python?,str2bool('1') |
how to iterate over time periods in pandas,"s.resample('3M', how='sum')" |
appending to dict of lists adds value to every key,d = {k: [] for k in keys} |
python convert list to dictionary,"l = [['a', 'b'], ['c', 'd'], ['e']]" |
display maximum output data of columns in dataframe `pandas` that will fit into the screen,"pandas.set_option('display.max_columns', None)" |
insert element in python list after every nth element,"['a', 'b', 'c', 'x', 'd', 'e', 'f', 'x', 'g', 'h', 'i', 'x', 'j']" |
sorting a list of dictionary values by date in python,"list.sort(key=lambda item: item['date'], reverse=True)" |
python pandas - how to flatten a hierarchical index in columns,pd.DataFrame(df.to_records()) |
how to plot a wav file,plt.show() |
how to multiply all integers inside list,"l = list(map(lambda x: 2 * x, l))" |
reverse a string `a_string`,"def reversed_string(a_string): |
return a_string[::(-1)]" |
how to add a new div tag in an existing html file after a h1 tag using python,htmlFile = open('path to html file').read() |
split a list `l` into evenly sized chunks `n`,"[l[i:i + n] for i in range(0, len(l), n)]" |
get the first element of each tuple in a list `rows`,[x[0] for x in rows] |
what is the best way to sort list with custom sorting parameters in python?,li1.sort(key=lambda x: not x.startswith('b.')) |
drawing a huge graph with networkx and matplotlib,plt.savefig('graph.pdf') |
print 'here is your checkmark: ' plus unicode character u'\u2713',print('here is your checkmark: ' + '\u2713') |
list manipulation in python,"var1, var2, var3 = (ll + [None] * 3)[:3]" |
php to python pack('h'),binascii.hexlify('Dummy String') |
"how to use applymap, lambda and dataframe together to filter / modify dataframe in python?",df.fillna('o') |
specifying and saving a figure with exact size in pixels,"plt.savefig('myfig.png', dpi=1000)" |
convert column of date objects in pandas dataframe to strings,df['A'].apply(lambda x: x.strftime('%d%m%Y')) |
how to use ax.get_ylim() in matplotlib,"ax.axhline(1, color='black', lw=2)" |
how do you check if a string contains only numbers - python,str.isdigit() |
adding calculated column(s) to a dataframe in pandas,d['A'][1:] < d['C'][:-1] |
most pythonic way to print *at most* some number of decimal places,"format(f, '.2f').rstrip('0').rstrip('.')" |
indexerror when trying to read_table with pandas,"len(['DATE', 'TIME', 'DLAT', 'DLON', 'SLAT', 'SLON', 'SHGT', 'HGT', 'N', 'E'])" |
slicing a multidimensional list,[x[0] for x in listD[2]] |
get a list of booleans `z` that shows wether the corresponding items in list `x` and `y` are equal,"z = [(i == j) for i, j in zip(x, y)]" |
how to give a pandas/matplotlib bar graph custom colors,"df.plot(kind='bar', stacked=True, color=my_colors)" |