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AhmedSSoliman

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reshape pandas dataframe from rows to columns

df2.groupby('Name').apply(tgrp)

how do i convert a string of hexadecimal values to a list of integers?

struct.unpack('11B', s)

reading gps rinex data with pandas

df.set_index(['%_GPST', 'satID'])

search for "does-not-contain" on a dataframe in pandas

~df['col'].str.contains(word)

pythonic way to convert list of dicts into list of namedtuples

items = [some(m['a'].split(), m['d'], m['n']) for m in dl]

remove tags from a string `mystring`

re.sub('<[^>]*>', '', mystring)

how do i can format exception stacktraces in python logging?

logging.info('Sample message')

how do i create a list of unique random numbers?

random.sample(list(range(100)), 10)

delete digits at the end of string `s`

re.sub('\\b\\d+\\b', '', s)

in python, how do i index a list with another list?

T = [L[i] for i in Idx]

get values from a dictionary `my_dict` whose key contains the string `date`

[v for k, v in list(my_dict.items()) if 'Date' in k]

using flask blueprints, how to fix url_for from breaking if a subdomain is specified?

app.config['SERVER_NAME'] = 'example.net'

python append to array in json object

jsobj['a']['b']['e'].append(dict(f=var3))

find the euclidean distance between two 3-d arrays `a` and `b`

np.sqrt(((A - B) ** 2).sum(-1))

python: confusions with urljoin

urljoin('http://some', 'thing')

understanding == applied to a numpy array

np.arange(3)

capitalizing non-ascii words in python

print('\xe9'.capitalize())

sorting a defaultdict `d` by value

sorted(list(d.items()), key=lambda k_v: k_v[1])

how to compare dates in django

return date.today() > self.date

execute shell script from python with variable

subprocess.call(['test.sh', str(domid)])

convert a date string `s` to a datetime object

datetime.datetime.strptime(s, '%Y-%m-%dT%H:%M:%SZ')

how do i create a web interface to a simple python script?

app.run()

stacked bar chart with differently ordered colors using matplotlib

plt.show()

matplotlib boxplot without outliers

boxplot([1, 2, 3, 4, 5, 10], showfliers=False)

generate all permutations of list `[1, 2, 3]` and list `[4, 5, 6]`

print(list(itertools.product([1, 2, 3], [4, 5, 6])))

python dictionary to url parameters

urllib.parse.urlencode({'p': [1, 2, 3]}, doseq=True)

how to group dataframe by a period of time?

df.groupby([df['Source'], pd.TimeGrouper(freq='Min')])

get items from a dictionary `bigdict` where the keys are present in `('l', 'm', 'n')`

{k: bigdict.get(k, None) for k in ('l', 'm', 'n')}

selecting elements of a python dictionary greater than a certain value

{k: v for k, v in list(dict.items()) if v > something}

how to write a multidimensional array to a text file?

np.savetxt('test.txt', x)

remove strings from a list that contains numbers in python

my_list = [item for item in my_list if item.isalpha()]

for loop in python

list(range(0, 30, 5))

extract all keys from a list of dictionaries

[list(d.keys()) for d in LoD]

how to slice a 2d python array? fails with: "typeerror: list indices must be integers, not tuple"

array([[1, 3], [4, 6], [7, 9]])

python: convert list of key-value tuples into dictionary?

dict([('A', 1), ('B', 2), ('C', 3)])

matplotlib large set of colors for plots

plt.show()

check if a user `user` is in a group from list of groups `['group1', 'group2']`

return user.groups.filter(name__in=['group1', 'group2']).exists()

how do i merge a 2d array in python into one string with list comprehension?

[item for innerlist in outerlist for item in innerlist]

python regex alternative for join

re.sub('(.)(?=.)', '\\1-', s)

filtering out strings that contain 'ab' from a list of strings `lst`

[k for k in lst if 'ab' in k]

how to draw "two directions widths line" in matplotlib

plt.show()

writing hex data into a file

f.write(hex(i))

how to terminate process from python using pid?

process.terminate()

writing a list of sentences to a single column in csv with python

writer.writerows(['Hi, there'])

dictionary keys match on list; get key/value pair

new_dict = {k: my_dict[k] for k in my_list if k in my_dict}

string regex two mismatches python

re.findall('(?=([A-Z]SQP|S[A-Z]QP|SS[A-Z]P|SSQ[A-Z]))', s)

find max in nested dictionary

max(d, key=lambda x: d[x]['count'])

how to update matplotlib's imshow() window interactively?

draw()

break string into list elements based on keywords

['Na', '1', 'H', '1', 'C', '2', 'H', '3', 'O', '2']

select dataframe rows between two dates

df['date'] = pd.to_datetime(df['date'])

escaping quotes in string

replace('"', '\\"')

create dynamic button in pyqt

button.clicked.connect(self.commander(command))

pandas: counting unique values in a dataframe

pd.value_counts(d[['col_title1', 'col_title2']].values.ravel())

efficient way to convert a list to dictionary

{k: v for k, v in (e.split(':') for e in lis)}

how to plot empirical cdf in matplotlib in python?

plt.show()

gnuplot linecolor variable in matplotlib?

plt.show()

how to run spark java code in airflow?

sys.path.append(os.path.join(os.environ['SPARK_HOME'], 'bin'))

parsing json fields in python

print(b['indices']['client_ind_2']['index'])

how do i connect to a mysql database in python?

cur.execute('SELECT * FROM YOUR_TABLE_NAME')

remove characters "!@#$" from a string `line`

line.translate(None, '!@#$')

listing files from a directory using glob python

glob.glob('[!hello]*.txt')

find the index of the element with the maximum value from a list 'a'.

max(enumerate(a), key=lambda x: x[1])[0]

upload files to google cloud storage from appengine app

upload_url = blobstore.create_upload_url('/upload', gs_bucket_name='my_bucket')

how can i list only the folders in zip archive in python?

[x for x in file.namelist() if x.endswith('/')]

how do you set up a flask application with sqlalchemy for testing?

app.run()

match regex 'abc(de)fg(123)' on string 'abcdefg123 and again abcdefg123'

re.findall('abc(de)fg(123)', 'abcdefg123 and again abcdefg123')

python + mysqldb executemany

cursor.close()

creating a list by iterating over a dictionary

['{}_{}'.format(k, v) for k, l in list(d.items()) for v in l]

remove newline in string `s` on the right side

s.rstrip()

how can i insert a new tag into a beautifulsoup object?

self.new_soup.body.insert(3, new_tag)

how can i vectorize the averaging of 2x2 sub-arrays of numpy array?

y.mean(axis=(1, 3))

get only certain fields of related object in django

Comment.objects.filter(user=user).values_list('user__name', 'user__email')

most efficient method to get key for similar values in a dict

trie = {'a': {'b': {'e': {}, 's': {}}, 'c': {'t': {}, 'k': {}}}}

how to make a python script which can logoff, shutdown, and restart a computer?

subprocess.call(['shutdown', '/r'])

how to do simple http redirect using python?

print('Location:URL\r\n')

python date string formatting

my_date.strftime('%-m/%-d/%y')

how to hide output of subprocess in python 2.7

retcode = os.system("echo 'foo' &> /dev/null")

how to check whether a method exists in python?

hasattr(Dynamo, 'mymethod') and callable(getattr(Dynamo, 'mymethod'))

convert double to float in python

struct.unpack('f', struct.pack('f', 0.00582811585976))

efficient way to convert a list to dictionary

dict([x.split(':') for x in a])

how to remove gaps between subplots in matplotlib?

plt.show()

delete an element `key` from a dictionary `d`

del d[key]

reading a triangle of numbers into a 2d array of ints in python

arr = [[int(i) for i in line.split()] for line in open('input.txt')]

extract data field 'bar' from json object

json.loads('{"foo": 42, "bar": "baz"}')['bar']

pandas create new column based on values from other columns

df.apply(lambda row: label_race(row), axis=1)

editing the date formatting of x-axis tick labels in matplotlib

ax.xaxis.set_major_formatter(myFmt)

create a list of integers with duplicate values in python

print([u for v in [[i, i] for i in range(5)] for u in v])

select `div` tags whose `id`s begin with `value_xxx_c_1_f_8_a_`

soup.select('div[id^="value_xxx_c_1_f_8_a_"]')

how do i sort a list of strings in python?

mylist.sort(key=str.lower)

reverse a string `a` by 2 characters at a time

"""""".join(reversed([a[i:i + 2] for i in range(0, len(a), 2)]))

slice `url` with '&' as delimiter to get "http://www.domainname.com/page?content_item_id=1234" from url "http://www.domainname.com/page?content_item_id=1234&param2&param3 "

url.split('&')

count occurrence of a character in a string

"""Mary had a little lamb""".count('a')

how do i display add model in tabular format in the django admin?

{'fields': ('first_name', 'last_name', 'address', 'city', 'state')}

how to sort with lambda in python

a = sorted(a, key=lambda x: x.modified, reverse=True)

get key-value pairs in dictionary `my_dictionary` for all keys in list `my_list` in the order they appear in `my_list`

dict(zip(my_list, map(my_dictionary.get, my_list)))

is it possible to take an ordered "slice" of a dictionary in python based on a list of keys?

map(my_dictionary.get, my_list)

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)