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"Running a python debug session from a program, not from the console",p.communicate('continue') |
How to initialise a 2D array in Python?,"[[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]]" |
Python Pandas - How to flatten a hierarchical index in columns,pd.DataFrame(df.to_records()) |
Creating new binary columns from single string column in pandas,pd.get_dummies(df['Speed']) |
Initializing a list to a known number of elements in Python,verts = [[(0) for x in range(100)] for y in range(10)] |
create dictionary from list of variables,"createDict('foo', 'bar')" |
Setting up SCons to Autolint,"env.Program('test', Glob('*.cpp'))" |
python dict comprehension with two ranges,"{k: v for k, v in zip(range(1, 5), count(7))}" |
Escape string Python for MySQL,cursor.execute(sql) |
Pandas HDFStore of MultiIndex DataFrames: how to efficiently get all indexes,"store.select('df', columns=['A'])" |
Pandas: Counting unique values in a dataframe,"pd.value_counts(d[['col_title1', 'col_title2']].values.ravel())" |
Passing a List to Python From Command Line,main(sys.argv[1:]) |
Regex to allow safe characters,"""""""^[A-Za-z0-9._~()'!*:@,;+?-]*$""""""" |
Removing space in dataframe python,"formatted.columns = [x.strip().replace(' ', '_') for x in formatted.columns]" |
Django datetime issues (default=datetime.now()),"date = models.DateTimeField(default=datetime.now, blank=True)" |
How to make a simple cross-platform webbrowser with Python?,sys.exit(app.exec_()) |
How to implement a dynamic programming algorithms to TSP in Python?,A = [[(0) for i in range(n)] for j in range(2 ** n)] |
TypeError: a float is required,x = float(x) |
How do I suppress scientific notation in Python?,"""""""{0:f}"""""".format(x / y)" |
smartest way to join two lists into a formatted string,"c = ', '.join('{}={}'.format(*t) for t in zip(a, b))" |
"Sqlite3, OperationalError: unable to open database file",conn = sqlite3.connect('C:\\users\\guest\\desktop\\example.db') |
Sort order of lists in multidimensional array in Python,"sorted(test, key=lambda x: isinstance(x, list) and len(x) or 1)" |
pandas data frame indexing using loc,"pd.Series([pd.Timestamp('2014-01-02'), 'THU', 'THU'])" |
pandas data frame indexing using loc,df['Weekday'].loc[1] |
Using nx.write_gexf in Python for graphs that have dict data on nodes and edges,"G.add_edge(0, 1, likes=['milk', 'oj'])" |
Notebook widget in Tkinter,root.mainloop() |
Output utf-8 characters in django as json,"print(json.dumps('\u0411', ensure_ascii=False))" |
How to filter files (with known type) from os.walk?,"files = [file for file in files if not file.endswith(('.dat', '.tar'))]" |
Converting a full column of integer into string with thousands separated using comma in pandas,"df['Population'].str.replace('(?!^)(?=(?:\\d{3})+$)', ',')" |
How are POST and GET variables handled in Python?,print(request.form['username']) |
Multiple levels of keys and values in Python,creatures['birds']['eagle']['female'] += 1 |
Python Matplotlib - Smooth plot line for x-axis with date values,fig.show() |
Difference between every pair of columns of two numpy arrays (how to do it more efficiently)?,"((a[:, (np.newaxis), :] - v) ** 2).sum(axis=-1).shape" |
How to scroll text in Python/Curses subwindow?,stdscr.getch() |
applying functions to groups in pandas dataframe,df.groupby('type').apply(foo) |
Updating the x-axis values using matplotlib animation,plt.show() |
Parsing JSON with python: blank fields,"entries['extensions'].get('telephone', '')" |
Python - datetime of a specific timezone,print(datetime.datetime.now(EST())) |
Selenium with pyvirtualdisplay unable to locate element,content = browser.find_element_by_id('content') |
Get norm of numpy sparse matrix rows,"n = np.sqrt(np.einsum('ij,ij->i', a, a))" |
"How to print a list with integers without the brackets, commas and no quotes?","print(int(''.join(str(x) for x in [7, 7, 7, 7])))" |
"Given a list of variable names in Python, how do I a create a dictionary with the variable names as keys (to the variables' values)?","dict((name, eval(name)) for name in list_of_variable_names)" |
SQLAlchemy: How to order query results (order_by) on a relationship's field?,session.query(Base).join(Base.owner).order_by(Player.name) |
How to write text on a image in windows using python opencv2,"cv2.putText(image, 'Hello World!!!', (x, y), cv2.FONT_HERSHEY_SIMPLEX, 2, 255)" |
Counting how many times a row occurs in a matrix (numpy),(array_2d == row).all(-1).sum() |
Python list sorting dependant on if items are in another list,"sorted([True, False, False])" |
Get random sample from list while maintaining ordering of items?,"random.sample(range(len(mylist)), sample_size)" |
How do I dissolve a pattern in a numpy array?,"array([[0, 1, 0], [1, 1, 1], [0, 1, 0]])" |
changing file extension in Python,os.path.splitext('name.fasta')[0] + '.aln' |
find row or column containing maximum value in numpy array,"np.argmax(np.max(x, axis=0))" |
Missing data in pandas.crosstab,"pd.crosstab(a, [b, c], rownames=['a'], colnames=['b', 'c'], dropna=False)" |
Add horizontal lines to plot based on sort_values criteria,plt.show() |
How to filter rows of Pandas dataframe by checking whether sub-level index value within a list?,df[df.index.levels[0].isin([int(i) for i in stk_list])] |
Reverse each word in a string,""""""" """""".join(w[::-1] for w in s.split())" |
Replacing the empty strings in a string,"string2.replace('', string1)" |
How to use Jenkins Environment variables in python script,qualifier = os.environ['QUALIFIER'] |
Pandas groupby where all columns are added to a list prefixed by column name,df.groupby('id1').apply(func) |
Group dictionary key values in python,mylist.sort(key=itemgetter('mc_no')) |
How to calculate a column in a Row using two columns of the previous Row in Spark Data Frame?,df.show() |
How do I create an OpenCV image from a PIL image?,"cv.ShowImage('pil2ipl', cv_img)" |
Python - how to delete hidden signs from string?,"new_string = re.sub('[^{}]+'.format(printable), '', the_string)" |
Python: for loop - print on the same line,print(' '.join([function(word) for word in split])) |
"Python 2.7 - find and replace from text file, using dictionary, to new text file","output = open('output_test_file.txt', 'w')" |
How to write a python script that can communicate with the input and output of a swift executable?,process.stdin.flush() |
How to make a numpy array from an array of arrays?,np.vstack(counts_array) |
How to select ticks at n-positions in a log plot?,ax.xaxis.set_major_locator(ticker.LogLocator(numticks=6)) |
Convert python datetime to epoch with strftime,"datetime.datetime(2012, 4, 1, 0, 0).timestamp()" |
re.split with spaces in python,"re.findall(' +|[^ ]+', s)" |
How to select rows start with some str in pandas?,"df[~df.col.str.startswith(('t', 'c'))]" |
Django: How to filter Users that belong to a specific group,qs = User.objects.filter(groups__name__in=['foo']) |
Efficient way to shift a list in python,"shift([1, 2, 3], 14)" |
python sorting two lists,"[list(x) for x in zip(*sorted(zip(list1, list2), key=itemgetter(0)))]" |
Prevent numpy from creating a multidimensional array,"np.ndarray((2, 3), dtype=object)" |
How to use Unicode characters in a python string,print('\u25b2') |
Update and create a multi-dimensional dictionary in Python,d['js'].append({'other': 'thing'}) |
Returning millisecond representation of datetime in python,date_time_secs = time.mktime(datetimeobj.timetuple()) |
How do I format a number with a variable number of digits in Python?,"""""""One hundred and twenty three with three leading zeros {0:06}."""""".format(123)" |
Sanitizing a file path in python,os.makedirs(path_directory) |
Python MySQL Parameterized Queries,"c.execute('SELECT * FROM foo WHERE bar = %s AND baz = %s' % (param1, param2))" |
median of pandas dataframe,df['dist'].median() |
Dijkstra's algorithm in python,"{'E': 2, 'D': 1, 'G': 2, 'F': 4, 'A': 4, 'C': 3, 'B': 0}" |
tuple digits to number conversion,"float('{0}.{1}'.format(a[0], ''.join(str(n) for n in a[1:])))" |
Shape of array python,"m[:, (0)].reshape(5, 1).shape" |
Arrows in matplotlib using mplot3d,ax.set_axis_off() |
Python Extract data from file,words = line.split() |
Pythonic way to check that the lengths of lots of lists are the same,"my_list = [[1, 2, 3], ['a', 'b'], [5, 6, 7]]" |
String reverse in Python,print(''.join(x[::-1] for x in pattern.split(string))) |
Initialize/Create/Populate a Dict of a Dict of a Dict in Python,"{'geneid': 'bye', 'tx_id': 'NR439', 'col_name1': '4.5', 'col_name2': 6.7}" |
django filter by datetime on a range of dates,queryset.filter(created_at__gte=datetime.date.today()) |
UnicodeDecodeError when reading a text file,"fileObject = open('countable nouns raw.txt', 'rt', encoding='utf8')" |
Format a datetime into a string with milliseconds,print(datetime.utcnow().strftime('%Y%m%d%H%M%S%f')) |
How do you get the process ID of a program in Unix or Linux using Python?,os.getpid() |
convert a list of booleans to string,"print(''.join(chr(ord('A') + i) if b else ' ' for i, b in enumerate(bools)))" |
Python unicode in Mac os X terminal,print('\xd0\xb0\xd0\xb1\xd0\xb2\xd0\xb3\xd0\xb4') |
How find values in an array that meet two conditions using Python,numpy.nonzero((a > 3) & (a < 8)) |
Python: split list of strings to a list of lists of strings by length with a nested comprehensions,"[['a', 'b'], ['ab'], ['abc']]" |
Extracting just Month and Year from Pandas Datetime column (Python),df['mnth_yr'] = df['date_column'].apply(lambda x: x.strftime('%B-%Y')) |
How can I split and parse a string in Python?,print(mystring.split(' ')) |
Filter Pyspark dataframe column with None value,df.filter('dt_mvmt is NULL') |
Python: return the index of the first element of a list which makes a passed function true,"next((i for i, v in enumerate(l) if is_odd(v)))" |
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