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Python: How to remove empty lists from a list?
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list2 = [x for x in list1 if x != []]
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Python: How to remove empty lists from a list?
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list2 = [x for x in list1 if x]
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Django view returning json without using template
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return HttpResponse(data, mimetype='application/json')
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regex to get all text outside of brackets
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re.findall('(.*?)\\[.*?\\]', example_str)
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regex to get all text outside of brackets
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re.findall('(.*?)(?:\\[.*?\\]|$)', example_str)
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Matching multiple regex patterns with the alternation operator?
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re.findall('\\(.+?\\)|\\w', '(zyx)bc')
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Matching multiple regex patterns with the alternation operator?
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re.findall('\\((.*?)\\)|(\\w)', '(zyx)bc')
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Matching multiple regex patterns with the alternation operator?
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re.findall('\\(.*?\\)|\\w', '(zyx)bc')
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Perform a string operation for every element in a Python list
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elements = ['%{0}%'.format(element) for element in elements]
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start python script as background process from within a python script
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subprocess.Popen(['background-process', 'arguments'])
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Python dictionary: Get list of values for list of keys
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[mydict[x] for x in mykeys]
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Create dictionary from lists of keys and multiple values
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dict([('Name', 'Joe'), ('Age', 22)])
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Numpy - Averaging multiple columns of a 2D array
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data.reshape(-1, j).mean(axis=1).reshape(data.shape[0], -1)
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Replace all quotes in a string with escaped quotes?
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print(s.encode('unicode-escape').replace('"', '\\"'))
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Partitioning a string in Python by a regular expression
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re.split('(\\W+)', s)
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plotting stacked barplots on a panda data frame
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df.plot(kind='barh', stacked=True)
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How to reverse a dictionary in Python?
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{i[1]: i[0] for i in list(myDictionary.items())}
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finding index of multiple items in a list
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[i for i, j in enumerate(myList) if 'how' in j.lower() or 'what' in j.lower()]
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find out if a Python object is a string
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isinstance(obj, str)
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find out if a Python object is a string
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isinstance(o, str)
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find out if a Python object is a string
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(type(o) is str)
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find out if a Python object is a string
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isinstance(o, str)
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find out if a Python object is a string
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isinstance(obj_to_test, str)
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take the content of a list and append it to another list
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list2.extend(list1)
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take the content of a list and append it to another list
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list1.extend(mylog)
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take the content of a list and append it to another list
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c.extend(a)
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take the content of a list and append it to another list
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for line in mylog:
list1.append(line)
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Appending tuples to lists
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b.append((a[0][0], a[0][2]))
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Where do I get a SECRET_KEY for Flask?
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app.config['SECRET_KEY'] = 'Your_secret_string'
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How to unpack a Series of tuples in Pandas?
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pd.DataFrame(out.tolist(), columns=['out-1', 'out-2'], index=out.index)
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How to find the position of an element in a list , in Python?
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[x for x in range(len(stocks_list)) if stocks_list[x] == 'MSFT']
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Is it possible to wrap the text of xticks in matplotlib in python?
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ax.set_xticklabels(labels, rotation=45)
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How to remove symbols from a string with Python?
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re.sub('[^\\w]', ' ', s)
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get current directory - Python
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os.path.basename(os.path.dirname(os.path.realpath(__file__)))
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Regex and Octal Characters
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print(re.findall("'\\\\[0-7]{1,3}'", str))
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Python split string based on regex
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re.split('[ ](?=[A-Z]+\\b)', input)
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Python split string based on regex
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re.split('[ ](?=[A-Z])', input)
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Using Python Requests to send file and JSON in single request
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r = requests.post(url, files=files, headers=headers, data=data)
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How to write bytes to a file in Python 3 without knowing the encoding?
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open('filename', 'wb').write(bytes_)
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Mapping dictionary value to list
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[dct[k] for k in lst]
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How to find duplicate names using pandas?
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x.set_index('name').index.get_duplicates()
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Truncating floats in Python
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round(1.923328437452, 3)
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Order list by date (String and datetime)
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sorted(li, key=lambda x: datetime.strptime(x[1], '%d/%m/%Y'), reverse=True)
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Move radial tick labels on a polar plot in matplotlib
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ax.set_rlabel_position(135)
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How to check if a path is absolute path or relative path in cross platform way with Python?
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os.path.isabs(my_path)
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Counting the Number of keywords in a dictionary in python
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len(list(yourdict.keys()))
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Counting the Number of keywords in a dictionary in python
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len(set(open(yourdictfile).read().split()))
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Pandas dataframe get first row of each group
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df.groupby('id').first()
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Splitting a list in a Pandas cell into multiple columns
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pd.concat([df[0].apply(pd.Series), df[1]], axis=1)
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Extracting specific src attributes from script tags
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re.findall('src="js/([^"]*\\bjquery\\b[^"]*)"', data)
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Most efficient way to convert items of a list to int and sum them up
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sum(int(float(item)) for item in [_f for _f in ['', '3.4', '', '', '1.0'] if _f])
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How to use subprocess when multiple arguments contain spaces?
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subprocess.Popen(['c:\\Program Files\\VMware\\VMware Server\\vmware-cmd.bat'])
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how to reverse a priority queue in Python without using classes?
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q.put((-n, n))
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pandas plot dataframe barplot with colors by category
|
df['group'].plot(kind='bar', color=['r', 'g', 'b', 'r', 'g', 'b', 'r'])
|
Python regex for MD5 hash
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re.findall('([a-fA-F\\d]{32})', data)
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Getting the length of an array
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len(my_list)
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Getting the length of an array
|
len(l)
|
Getting the length of an array
|
len(s)
|
Getting the length of an array
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len(my_tuple)
|
Getting the length of an array
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len(my_string)
|
remove escape character from string
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"""\\a""".decode('string_escape')
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Python string replace two things at once?
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"""obama""".replace('a', '%temp%').replace('b', 'a').replace('%temp%', 'b')
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How do I remove/delete a folder that is not empty with Python?
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shutil.rmtree('/folder_name')
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in pandas how can I groupby weekday() for a datetime column?
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data['weekday'] = data['my_dt'].apply(lambda x: x.weekday())
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How to sort Counter by value? - python
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sorted(x, key=x.get, reverse=True)
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How to sort Counter by value? - python
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sorted(list(x.items()), key=lambda pair: pair[1], reverse=True)
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Append a NumPy array to a NumPy array
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np.vstack((a, b))
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numpy concatenate two arrays vertically
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print(concatenate((a, b), axis=0))
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numpy concatenate two arrays vertically
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print(concatenate((a, b), axis=1))
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numpy concatenate two arrays vertically
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c = np.r_[(a[None, :], b[None, :])]
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numpy concatenate two arrays vertically
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np.array((a, b))
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How can I do DNS lookups in Python, including referring to /etc/hosts?
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print(socket.getaddrinfo('google.com', 80))
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How to update a subset of a MultiIndexed pandas DataFrame
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df.xs('sat', level='day', drop_level=False)
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How do I return a 401 Unauthorized in Django?
|
return HttpResponse('Unauthorized', status=401)
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How to dynamically select template directory to be used in flask?
|
Flask(__name__, template_folder='wherever')
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How do I INSERT INTO t1 (SELECT * FROM t2) in SQLAlchemy?
|
session.execute('INSERT INTO t1 (SELECT * FROM t2)')
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Sorting a list of lists in Python
|
c2.sort(key=lambda row: row[2])
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Sorting a list of lists in Python
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c2.sort(key=lambda row: (row[2], row[1], row[0]))
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Sorting a list of lists in Python
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c2.sort(key=lambda row: (row[2], row[1]))
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Non-ASCII characters in Matplotlib
|
matplotlib.rc('font', **{'sans-serif': 'Arial', 'family': 'sans-serif'})
|
Pandas datetime column to ordinal
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df['date'].apply(lambda x: x.toordinal())
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Get HTML Source of WebElement in Selenium WebDriver using Python
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element.get_attribute('innerHTML')
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Most efficient way to get the integer index of a key in pandas
|
df.index.get_loc('bob')
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open a terminal from python
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os.system('gnome-terminal -e \'bash -c "sudo apt-get update; exec bash"\'')
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Python - How to declare and add items to an array?
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my_dict.update({'third_key': 1})
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Python - How to declare and add items to an array?
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my_list = []
|
Python - How to declare and add items to an array?
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my_list.append(12)
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Add entry to list and remove first one in Python
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myList.insert(0, 'wuggah')
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Converting a hex-string representation to actual bytes in Python
|
"""\\xF3\\xBE\\x80\\x80""".replace('\\x', '').decode('hex')
|
How to select the last column of dataframe
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df[df.columns[-1]]
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How to get a value from a Pandas DataFrame and not the index and object type
|
df.loc[df['Letters'] == 'C', 'Letters'].values[0]
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Converting two lists into a matrix
|
np.column_stack(([1, 2, 3], [4, 5, 6]))
|
determine the variable type
|
type(i)
|
determine the variable type
|
type(v)
|
determine the variable type
|
type(v)
|
determine the variable type
|
type(v)
|
determine the variable type
|
type(v)
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determine the variable type
|
print(type(variable_name))
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Get the nth item of a generator in Python
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next(itertools.islice(range(10), 5, 5 + 1))
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printing double quotes around a variable
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print('"{}"'.format(word))
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