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Django filter JSONField list of dicts,Test.objects.filter(actions__contains=[{'fixed_key_3': [{'key1': 'foo2'}]}]) |
hash unicode string in python,hashlib.sha1(s.encode('utf-8')) |
Best way to count the number of rows with missing values in a pandas DataFrame,"df.apply(lambda x: sum(x.isnull().values), axis=1)" |
How to filter a dictionary according to an arbitrary condition function?,"{k: v for k, v in points.items() if v[0] < 5 and v[1] < 5}" |
How to modify a variable inside a lambda function?,"return myFunc(lambda a, b: iadd(a, b))" |
If any item of list starts with string?,any(item.startswith('qwerty') for item in myList) |
How can I make an animation with contourf()?,pl.show() |
When and how to use Python's RLock,self.changeB() |
How to send file as stream from python to a C library,main() |
How can I get the IP address of eth0 in Python?,return s.getsockname()[0] |
How to get one number specific times in an array python,"array([4, 5, 5, 6, 6, 6])" |
How to replace the first occurrence of a regular expression in Python?,"re.sub('foo', 'bar', s, 1)" |
How to find the shortest string in a list in Python,"from functools import reduce |
reduce(lambda x, y: x if len(x) < len(y) else y, l)" |
SymPy/SciPy: solving a system of ordinary differential equations with different variables,"odeint(dX_dt, [1, 2], np.linspace(0, 1, 5))" |
How to call a system command with specified time limit in Python?,"os.killpg(self.process.pid, signal.SIGTERM)" |
3D plot with Matplotlib,ax.set_zlabel('Z') |
How do I remove all punctuation that follows a string?,"""""""words!?.,;:"""""".rstrip('?:!.,;')" |
"python, format string","'%s %%s %s' % ('foo', 'bar')" |
Join last element in list,""""""" & """""".join(['_'.join(inp[:2]), '_'.join(inp[2:])])" |
Close all open files in ipython,fh.close() |
Is there a function in Python which generates all the strings of length n over a given alphabet?,"[''.join(i) for i in itertools.product('ab', repeat=4)]" |
Django: How to filter Users that belong to a specific group,"qs = User.objects.filter(groups__name__in=['foo', 'bar'])" |
Pythonic way to use range with excluded last number?,"list(range(0, 100, 5))" |
"How to ""scale"" a numpy array?","np.kron(a, np.ones((n, n)))" |
Passing newline within string into a python script from the command line,"print(string.replace('\\n', '\n'))" |
Converting from a string to boolean in Python?,str2bool('no') |
Converting from a string to boolean in Python?,str2bool('stuff') |
Converting from a string to boolean in Python?,str2bool('1') |
Converting from a string to boolean in Python?,str2bool('0') |
Python: print a generator expression?,[x for x in foo] |
Secondary axis with twinx(): how to add to legend?,plt.show() |
Best way to get the nth element of each tuple from a list of tuples in Python,"[x for x, y, z in G]" |
Django urls with empty values,"url('^api/student/(?P<pk>.*)/(?P<pk2>.*)/$', api.studentList.as_view())," |
Writing nicely formatted text in Python,"f.write('%-40s %6s %10s %2s\n' % (filename, type, size, modified))" |
get UTC timestamp in python with datetime,dt = dt.replace(tzinfo=timezone('Europe/Amsterdam')) |
How to sort a dataFrame in python pandas by two or more columns?,"df1 = df1.sort(['a', 'b'], ascending=[True, False])" |
List indexes of duplicate values in a list with Python,"print(list_duplicates([1, 2, 3, 2, 1, 5, 6, 5, 5, 5]))" |
delete the first element in subview of a matrix,"b = np.delete(a, i, axis=0)" |
String arguments in python multiprocessing,"p = multiprocessing.Process(target=write, args=('hello',))" |
Find element by text with XPath in ElementTree,"print(doc.xpath('//element[text()=""A""]')[0].tag)" |
Is there a way to use ribbon toolbars in Tkinter?,root.mainloop() |
How to initialize nested dictionaries in Python,my_tree['a']['b']['c']['d']['e'] = 'whatever' |
Trying to converting a matrix 1*3 into a list,my_list = [col for row in matrix for col in row] |
Simple Python Regex Find pattern,"print(re.findall('\\bv\\w+', thesentence))" |
How to check the existence of a row in SQLite with Python?,"cursor.execute('create table components (rowid int,name varchar(50))')" |
python BeautifulSoup searching a tag,"print(soup.find_all('a', {'class': 'black'}))" |
3D plot with Matplotlib,ax.set_xlabel('X') |
"How can I get the values that are common to two dictionaries, even if the keys are different?",list(set(dict_a.values()) & set(dict_b.values())) |
How to extract the year from a Python datetime object?,a = datetime.date.today().year |
finding duplicates in a list of lists,"map(list, list(totals.items()))" |
convert String to MD5,hashlib.md5('fred'.encode('utf')).hexdigest() |
Write multiple NumPy arrays into CSV file in separate columns?,"np.savetxt('output.dat', output, delimiter=',')" |
find row or column containing maximum value in numpy array,"np.argmax(np.max(x, axis=1))" |
Multiple Element Indexing in multi-dimensional array,"array([0.49482768, 0.53013301, 0.4485054, 0.49516017, 0.47034123])" |
reading a file in python,"reader = csv.reader(open('filename'), delimiter='\t')" |
Python + MySQLdb executemany,cursor.close() |
if/else statements accepting strings in both capital and lower-case letters in python,"""""""3"""""".lower()" |
How to make lists distinct?,my_list = list(set(my_list)) |
dict keys with spaces in Django templates,{{(test | getkey): 'this works'}} |
how to make arrow that loops in matplotlib?,plt.show() |
Print a big integer with punctions with Python3 string formatting mini-language,"""""""{:,}"""""".format(x).replace(',', '.')" |
"""pythonic"" method to parse a string of comma-separated integers into a list of integers?","mylist = [int(x) for x in '3 ,2 ,6 '.split(',')]" |
How to properly use python's isinstance() to check if a variable is a number?,"isinstance(var, (int, float, complex))" |
Convert strings to int or float in python 3?,print('2 + ' + str(integer) + ' = ' + str(rslt)) |
How to make markers on lines smaller in matplotlib?,"plt.errorbar(x, y, yerr=err, fmt='-o', markersize=2, color='k', label='size 2')" |
How do I modify the last line of a file?,f.close() |
Django M2M QuerySet filtering on multiple foreign keys,"participants = models.ManyToManyField(User, related_name='conversations')" |
Changing file permission in python,"subprocess.call(['chmod', '0444', 'path'])" |
How do I query objects of all children of a node with Django mptt?,Student.objects.filter(studentgroup__level__pk=1) |
Python: How can I find all files with a particular extension?,glob.glob('?.gif') |
How to read a config file using python,"self.path = configParser.get('your-config', 'path1')" |
parsing json fields in python,print(b['indices']['client_ind_2']['index']) |
How to create a menu and submenus in Python curses?,self.window.keypad(1) |
How can I simulate input to stdin for pyunit?,"sys.stdin = open('simulatedInput.txt', 'r')" |
Add custom method to string object,sayhello('JOHN'.lower()) |
From ND to 1D arrays,a.flatten() |
How do you get a directory listing sorted by creation date in python?,files.sort(key=lambda x: os.path.getmtime(x)) |
How to create list of 3 or 4 columns of Dataframe in Pandas when we have 20 to 50 colums?,df[df.columns[2:5]] |
Getting Unique Foreign Keys in Django?,Farm.objects.filter(tree__in=TreeQuerySet) |
Django circular model reference,team = models.ForeignKey('Team') |
Convert base-2 binary number string to int,"int('11111111', 2)" |
Changing the color of the offset in scientific notation in matplotlib,"ax1.ticklabel_format(style='sci', scilimits=(0, 0), axis='y')" |
How can I check a Python unicode string to see that it *actually* is proper Unicode?,""""""""""""".decode('utf8')" |
Reading in integer from stdin in Python,bin('10') |
Spawning a thread in python,t.start() |
Matplotlib contour plot with intersecting contour lines,plt.show() |
sorting lines of file python,"re.split('\\s+', line)" |
Get starred messages from GMail using IMAP4 and python,IMAP4.select('[Gmail]/Starred') |
Find First Non-zero Value in Each Row of Pandas DataFrame,"df.replace(0, np.nan).bfill(1).iloc[:, (0)]" |
How to create a hyperlink with a Label in Tkinter?,root.mainloop() |
Retrieving contents from a directory on a network drive (windows),os.listdir('\\networkshares\\folder1\\folder2\\folder3') |
python cherrypy - how to add header,cherrypy.quickstart(Root()) |
Why Pandas Transform fails if you only have a single column,df.groupby('a')['a'].transform('count') |
How can I run an external command asynchronously from Python?,p.terminate() |
python pandas: plot histogram of dates?,df.date = df.date.astype('datetime64') |
How to access HttpRequest from urls.py in Django,"return super(MyListView, self).dispatch(request, *args, **kwargs)" |
Index the first and the last n elements of a list,l[:3] + l[-3:] |
How to find common elements in list of lists?,set([1]) |
How to get the number of <p> tags inside div in scrapy?,"len(response.xpath('//div[@class=""entry-content""]/p'))" |
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