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
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…
ufunc ‘add’ did not contain loop with signature matching type dtype (‘S32’) (‘S32’) (‘S32’)
I’m trying to run someone’s script for some simulations I’ve made to try plotting some histograms, but when I do I always get the error message mentioned above. I have no idea what’s gone wrong. Here’s the complete traceback error I get: This is the code I am trying to run: What …
List of all classification algorithms [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 28 days ago. The community reviewed whether to reopen this question 28 days ago and left it closed: Original …
NaN values in pivot_table index causes loss of data
Here is a simple DataFrame: Pivot method 1 The data can be pivoted to this: Downside: data in the 2nd row is lost because df[‘b’][1] == None. Pivot method 2 Downside: column b is lost. How can the two methods be combined so that columns b and the 2nd row are kept like so: More generally: How can i…
How can I sum the product of two list items using for loop in python?
I am trying to sum the product of two different list items in the same line using for loop, but I am not getting the output as expected. My example code: output: expected output: Answer Just zip the lists to generate pairs, multiply them and feed to sum: In above zip will return iterable of tuples containing …
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…
Checking if a list has duplicate lists
Given a list of lists, I want to make sure that there are no two lists that have the same values and order. For instance with my_list = [[1, 2, 4, 6, 10], [12, 33, 81, 95, 110], [1, 2, 4, 6, 10]] it is supposed to return me the existence of duplicate lists, i.e. [1, 2, 4, 6, 10].
Is it possible to remove ‘Currently’ label when using django-stdimage?
I am using django-stdimage in my Django app and it works great, the only problem is that I want to remove the ‘Currently’ string, the clear checkbox and the rest of the decoration from the HTML template. I can’t figure out how to achieve this. Here is the StdImageField declaration inside my …
The correct way to annotate a “file type” in Python [duplicate]
This question already has answers here: Type hint for a file or file-like object? (2 answers) Closed 8 months ago. In modern versions of Python one can have static type analysis using function annotations, according to PEP 484. This is made easy through the typing module. Now I’m wondering how I would g…