I am new to Python, I read in a book that strings are immutable. Then how does replace() function work in Python? Does it slice up to the part where it finds the text that we want to replace and add the text with new string and then add the remaining text which is after the text we want to
Tag: python-3.x
How to import all fields from xls as strings into a Pandas dataframe?
I am trying to import a file from xlsx into a Python Pandas dataframe. I would like to prevent fields/columns being interpreted as integers and thus losing leading zeros or other desired heterogenous formatting. So for an Excel sheet with 100 columns, I would do the following using a dict comprehension with r…
Python Geo-Spatial Coordinate Format Conversion
I have a dataframe containing 6 columns of coordinate pairs: (for both latitude and longitude). This is known as the NAD83 format. I want to convert these into a new dataframe of only 2 columns in decimal format, known as NAD27. The library I typically use, geopy supports virtually every format, so there actu…
Python 3 – Gaussian divisors of a Gaussian integer
I’m trying to write a method to generate a sequence of Gaussian divisors of a Gaussian integer – a Gaussian integer is either a normal integer or a complex number g = a + bi where a and b are both integers, and a Gaussian divisor of a Gaussian integer g is a Gaussian integer d such that g /
Drawing Semi-Circles in Pygame
Is there a way to draw a semicircle in Pygame? Something like this: pygame.surface.set_clip() will not work for this – I need circles that look like pie slices as well, like this one: Answer PyGame has no function to create filled arc/pie but you can use PIL/pillow to generate bitmap with pieslice and c…
Is there a way to set up start viewing position in excel sheet?
Normally Excel remembers where you stopped at a sheet and when you open it next time it takes you right there. Is there a way to set up such a position when generating the document? Answer With the pywin32 package, you can control Excel with COM and automate anything that Excel can do. Here’s an example…
bisect_left on first item of list within list, Python 3
I have a list like this for example: and I need to = bisect_left the first item of each tuple to find an index in the list. However, I can’t think of a way of doing this without creating a list of all of these first items before hand: exampleList = [L[i][0] for i in range(len(L))] any ideas on another
Python asyncio task list generation without executing the function
While working in asyncio, I’m trying to use a list comprehension to build my task list. The basic form of the function is as follows: My goal is to use a list of terms to create my task list: My initial thought was: This doesn’t create the task list it runs the function during the list comprehensi…
Writing To CSV file Without Line Space in Python 3
I am trying out the program for writing to a CSV file. Here’s my code: The program runs well. But in the CSV file, there is a blank newline space (without any entries) between each entry. How to eliminate that line in the resultant CSV file? Answer Recommended implementation per Python3 Documentation. h…
How to use await in a python lambda
I’m trying to do something like this: But I get this error: Which makes sense because the lambda is not async. I tried to use async lambda x: … but that throws a SyntaxError: invalid syntax. Pep 492 states: Syntax for asynchronous lambda functions could be provided, but this construct is outside o…