# python weekly reports

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-12-25 15:54:16 GMT

1. Combine 2 string columns in pandas with different conditions in both columns - [8/5]
2. Unable to perform any actions on elements which were located under flexbox - [8/1]
3. NamedTuple with default values - [7/1]
4. Remove consecutive duplicates while keeping the max value - [6/4]
5. Rolling sum based on all previous dates NOT previous rows sorted by date - [6/3]
6. Proper C++ type for nested list of arbitrary and variable depth? - [6/3]
7. Programming a probability of twins reunion - [6/2]
8. Check if values in a column exist elsewhere in a dataframe row - [5/4]
9. How to speed up the agg of pandas groupby bins? - [5/4]
10. python How to transpose the count of values in one pandas data frame to multiple columns in a second data frame? - [5/3]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-12-18 14:29:24 GMT

1. Can a function and local variable have the same name? - [14/4]
2. How to override names of dataclasses attributes in Python? - [9/2]
3. Ensure that an argument can be iterated twice - [8/4]
4. What allows bare class instances to have assignable attributes? - [8/1]
5. Python pandas equivalent to R's group_by, mutate, and ifelse - [7/4]
6. python pandas "groupby" and "if any" condition - [7/2]
7. Pandas group by cumsum with a flag condition - [7/2]
8. Filtering a mutli-index - [7/1]
9. Pythonic way to make a dictionary from lists of unequal length without padding Nones - [7/1]
10. How to get a uniformly-distributed random integer-points in an nD ball? - [7/0]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-12-11 22:35:35 GMT

1. Double antiderivative computation in python - [7/2]
2. How to make media file's URL restricted to the unauthenticated users in Django? - [7/1]
3. Inheriting Generic classes with restricted TypeVar - [5/2]
4. How to create substrings efficiently - [5/2]
5. How do i make the program print specific letters in this specific format i give to it? - [4/6]
6. Numpy array counter with reset - [4/6]
7. Define class method based on import success - [4/5]
8. __eq__ order enforcement in Python - [4/3]
9. Compare data series columns based on a column that contains duplicates - [4/2]
10. Get most common value for each value in row - pandas df - [4/2]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-12-04 16:23:51 GMT

1. Sorting multiple lists together in place - [8/1]
2. Trouble printing a generator expression as a list - [6/2]
3. Getting the value of a return after a yield in python - [5/5]
4. Round off date in data frame in Python - [5/3]
5. In pandas, how to pivot a dataframe on a categorical series with missing categories? - [5/2]
6. on what systems does Python not use IEEE-754 double precision floats - [5/1]
7. understanding sklearn calibratedClassifierCV - [5/1]
8. Fastest way to find all pairs of close numbers in a Numpy array - [4/5]
9. Python best way to 'swap' words (multiple characters) in a string? - [4/4]
10. How to reorder rows in pandas dataframe by factor level in python? - [4/3]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-11-27 16:50:46 GMT

1. Does NumPy array really take less memory than python list? - [8/2]
2. array_2 = array_1 vs. array_2 = array_1.view() - [7/1]
3. How can I use value_counts() only for certain values? - [5/3]
4. Find the indices where a sorted list of integer changes - [5/3]
5. pytube: AttributeError: 'NoneType' object has no attribute 'span' - [5/2]
6. Using pandas nullable integer dtype in np.where condition - [5/2]
7. Sum dataframe values in for loop inside a for loop - [5/1]
8. Python 3.10 pattern matching (PEP 634) - wildcard in string - [5/1]
9. How do I assign values from a dataframe to deciles created in another dataframe? - [5/0]
10. Why do these Python import scenarios work (or not) the way they do? - [5/0]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-11-20 15:01:04 GMT

1. Implementation of the Max() function in Python - [15/1]
2. Plot bar chart in multiple subplot rows with Pandas - [6/1]
3. Python threads difference for 3.10 and others - [6/1]
4. Using a postgres composite field containing a geography type for django ORM usage - [6/0]
5. Any simpler way to assign multiple columns in Python like R data.table := - [5/3]
6. How to build triangular matrix as df with data from dataframe - [5/3]
7. How to find the number of neighbours pixels in binary array - [5/1]
8. Why aren't Pandas operations in-place? - [5/0]
9. Sum of 1+3+5...+n until the sum exceeds 100 - [4/9]
10. Fillna if all the values of a column are null in pandas - [4/5]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-11-13 23:38:47 GMT

1. Why is Python list slower when sorted? - [14/3]
2. Combined aggregate based on valid values - [9/4]
3. Create a new column in a Pandas DataFrame from exisiting column names - [8/6]
4. Get min and max values of categorical variable in a dataframe - [8/4]
5. No module named wtforms.compat - [8/1]
6. Weird behaviour of assignment in pandas.DataFrame - [7/3]
7. How to hint homogenous list of instances of same subclass? - [7/0]
8. strange implicit conversion of data type in numpy - [6/1]
9. Why does lxml.etree.SubElement() allow making elements which are not serialisable? - [6/1]
10. For loop that adds and deducts from pandas columns - [6/0]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-11-06 16:14:07 GMT

1. After conda update, python kernel crashes when matplotlib is used - [28/2]
2. Repeating triangle pattern in Python - [21/6]
3. How to convert dataframe? - [6/3]
4. How do I find the row # of a string index? - [6/3]
5. Calculate determinant of unitary matrices based on SVD implementation - [6/0]
6. If condition with a dataframe - [5/5]
7. How to detect if `__init_subclass__` has been overridden in a subclass? - [5/3]
8. Transforming a list of points in a "rank" of indexes - [5/2]
9. How to create an interactive brain-shaped graph? - [5/1]
10. How to specify requirements in Python packages metadata - [5/1]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-10-30 13:46:37 GMT

1. NumPy: construct squares along diagonal of matrix / expand diagonal matrix - [15/3]
2. Convert subset of columns to rows by combining columns - [14/3]
3. Efficient algorithm to get all the combinations of numbers that are within a certain range from 2 lists in python - [8/2]
4. Is the key order the same for OrderedDict and dict? - [6/3]
5. Django REST API accept list instead of dictionary in post request - [6/2]
6. cannot update spyder=5.1.5 on new anaconda install - [6/1]
7. Why does starred assignment produce lists and not tuples? - [6/1]
8. Is there a way to match inequalities in Python ≥ 3.10? - [5/1]
9. Efficient way of using numpy memmap when training neural network with pytorch - [5/0]
10. How to find which column contains a certain value? - [4/4]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-10-23 13:48:47 GMT

1. Why does redefining a variable used in a generator give strange results? - [27/3]
2. Why does this Python snippet regarding dictionaries work? - [10/3]
3. Why doesn't mypy pass when TypedDict calls update method - [8/1]
4. How do I speed up all_pairs_dijkstra_path_length - [6/1]
5. NumPy memory leak in np.ones? - [6/0]
6. Iterate over pairs in order of sum of absolute values - [5/7]
7. Is there a way to improve the performance of this fractal calculation algorithm? - [5/2]
8. Reading Validation-Dataset takes indefinitely long - [5/0]
9. Measure performance for small application - [5/0]
10. Accessing __doc__ of function inside a lambda - [4/3]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-10-17 06:58:09 GMT

1. Why is there a difference between `0--3//2` and `--3//2`? - [21/2]
2. Why is `np.sum(range(N))` very slow? - [16/3]
3. Fast calculation of floating 1/N if factorization of very large integer N is known - [11/1]
4. Python function to find the numeric volume integral? - [8/2]
5. Add comma sepated values inside a column - [7/5]
6. Using assignment as operator - [7/1]
7. Disable Python auto concatenate strings across lines - [7/0]
8. How to shuffle the order of if statements in a function in Python? - [6/3]
9. How to disable server exceptions on fast-api when testing with httpx AsyncClient? - [6/2]
10. Is it possible to make the imports within `__init__.py` visible for python `help()` command? - [6/1]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-10-09 22:24:26 GMT

1. What is this odd sorting algorithm? - [61/5]
2. python regex where a set of options can occur at most once in a list, in any order - [11/7]
3. Django rest framework simple jwt: decode() got an unexpected keyword argument 'verify' - [11/2]
4. determine the range of a value using a look up table - [6/2]
5. How can I solve this arithmetic puzzle? My solution is too slow after n = 14 - [6/1]
6. Why do keyword arguments to a class definition reappear after they were removed? - [5/3]
7. walrus operator in dict comprehension - [5/2]
8. How to remove parent json element in python3 if child is object is empty - [5/2]
9. How to force keras to use tensorflow GPU backend - [5/2]
10. How to fillna in pandas dataframe based on pattern like in excel dragging? - [5/2]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-10-02 16:03:54 GMT

1. Why doesn't NaN raise any errors in python? - [8/1]
2. What is the fastest way to pass a message between two processes in python? - [8/0]
3. Why aren't augmented assignment expressions allowed? - [7/3]
4. Generating a dictionary of parameters from keyword arguments - [7/2]
5. How do you join multiple rows into one row in pandas? - [7/2]
6. Python program to print the pattern 1 121 12321 12 1 for n rows - [6/7]
7. Delay between different function calls - [6/4]
8. How can I combine elements of list in pairs in every iteration without repetition? - [6/3]
9. How to get an abstract dataclass to pass mypy? - [6/2]
10. How to hint at number *types* (i.e. subclasses of Number) - not numbers themselves? - [6/2]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-09-25 19:44:59 GMT

1. What's the point of using [object instance].__self__? - [24/2]
2. Adding water to stack of glasses - [10/2]
3. str.isdigit() behaviour when handling strings - [10/1]
4. Tuple with multiple numbers of arbitrary but equal type - [8/1]
5. Different access time to a value of a dictionary when mixing int and str keys - [8/1]
6. Why does the lines count differently using two different way. to load text? - [8/1]
7. How to read & decode Secure QR code on Indian Aadhaar Card image - [6/2]
8. Euler-Mascheroni Constant - [6/2]
9. Python: calling a child function using a string - [5/4]
10. Distinguishing between Pydantic Models with same fields - [5/2]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-09-18 20:56:51 GMT

1. Invoking a constructor in a 'with' statement - [30/3]
2. Numpy convolving along an axis for 2 2D-arrays - [8/2]
3. Checking if elements in an array exist in a pandas DataFrame - [7/6]
4. Order of evaluation of assignment expressions (walrus operator) - [7/1]
5. Why is this expression False? - [6/0]
6. Split a string in pandas row and insert new rows by enlarging the dataframe - [5/3]
7. Pandas: reading multi-index JSON as pandas data frame - [5/2]
8. Numpyic way to sort a matrix based on another similar matrix - [5/1]
9. How many different sums can we get from very few floats? - [5/1]
10. Python - doing maths with a nested list - [4/4]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-09-11 14:05:42 GMT

1. How is the s=s+c string concat optimization decided? - [10/1]
2. How do I save and load BatchNormalization Layer in this Tensorflow model? - [7/1]
3. How to read complex data in python? - [6/3]
4. Importing python sub-packages in a new package - [6/0]
5. CNN: correlation between filter size and stride - [6/0]
6. Mapping a[i+j] array to A[i,j] matrix - [5/3]
7. Find indices for elements in array B best matching those in array A - [5/3]
8. Pyspark > Dataframe with multiple array columns into multiple rows with one value each - [5/3]
9. Python multiprocessing making same object instance for every process - [5/3]
10. list __size__() result depending on creation method - [5/0]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-09-04 20:03:19 GMT

1. Filtering list of tuples based on condition - [10/3]
2. How can I find the k-th largest element in an exponentially large list? - [8/2]
3. Reversing Lists Splices Python Optimization (USACO February 2020 Bronze Question 3 "Swapity Swap") - [7/6]
4. Understanding what's happening in the Kadane Algorithm (Python) - [6/2]
5. Python - Is there a shorthand for [eg]: print(f'type(var) = {type(var)}') - [6/1]
6. Type a function with a callable - [6/1]
7. Make a list from multiple list - [5/8]
8. bash + how to capture the version from rpm - [5/7]
9. Spliting a list into n uneven buckets with all combinations - [5/3]
10. Why does order of function calls impact runtime - [5/2]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-08-28 12:24:19 GMT

1. Why is any(True for ... if cond) much faster than any(cond for ...)? - [54/4]
2. Efficiently insert multiple elements in a list (or another data structure) keeping their order - [6/2]
3. Is the [0]*n runs in O(n) or O(1) in Python - [6/0]
4. Efficient way to sort and concatenate the dataframes - [5/6]
5. How can I document methods inherited from a metaclass? - [5/2]
6. How to create the custom loss function by adding negative entropy to the cross-entropy? - [5/2]
7. How do I melt a pandas dataframe? - [5/1]
8. Split string without losing delimiter (and its count) - [4/3]
9. Python3 dataframe mutiple separators - [4/3]
10. Make Number of Rows Based on Column Values - Pandas/Python - [4/3]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-08-21 20:38:42 GMT

1. JSON upload to BigQuery - [8/1]
2. Installing SQLAlchemy with Poetry causes an AttributeErrorr - [6/2]
3. Pandas: Cell frequency count by index - [5/5]
4. How to calculate ratio of values in a pandas dataframe column? - [5/4]
5. Efficient way of Groupby Roll up/down for any kind of aggregates - [5/2]
6. Can anyone please explain why set is behaving like this with boolean in it? - [5/1]
7. numpy: accumulate 'greater' operation - [4/4]
8. Where can I find a full description of the "format" field for NumPy objects that includes 'Z' for "complex"? - [4/2]
9. Python list comparison numpy optimization - [4/2]
10. Problem with Anaconda Uninstall/Install (MacOS) - [4/1]

These are the ten most rated questions at Stack Overflow last week.
Between brackets: [question score / answers count]
Build date: 2021-08-14 20:04:45 GMT

1. Why does print(t) error if t.__str__() returns a non-string, but not print(t.__str__())? - [23/6]
2. Using __new__ in inherited dataclasses - [7/2]
3. Why does python's Exception's repr keep track of passed object's to __init__? - [6/3]
4. Using decorators of optional dependency - [5/1]
5. Rearranging License Plate characters based on country - [5/1]
6. Boxplot by two groups in pandas - [4/4]
7. subset multi-indexed df based on multiple level 1 columns - [4/4]
8. Why does the key 'kwargs' appear when using **kwargs? - [4/3]
9. How can I plot a function with errors in coefficients? - [4/3]
10. Heuristic to choose five column arrays that maximise the dot product - [4/2]