I am following CoreyMSchafer’s Flask-blog tutorial. Here, I can create, update and delete posts using WTForms and SQLAlchemy. However, to do that, I have to explicitly mention the name of the form fields. For example, to update a post (assuming a post only has title and content): where the model is and …
Tag: python
How to order dictionary based column?
I have a column that contains dictionary like below I need to write a Python code to sort each element in a column based on a value such as output will be like Can someone help with that please? I tried sorted function but it breaks at some point. Thank you! Answer I assume that Column_1 is a list:
Most efficient way to check if timestamp in list exists between two other timestamps?
I am trying to search a list of datetimes to check if there is a timestamp C that exists between timestamp A and B. I found the bisect stdlib but am not sure how to apply it here with datetime types. My setup is similar to this: I want to check if a timestamp in the list exists between my
How to filter a dataframe column having multiple values in Python
I have a data frame that sometimes has multiple values in cells like this: Now, I want to filter the data frame having an apple in the value. So my output should look like this: I used the str.contains(‘apple’) but this is not returning the ideal result. Can anyone help me with how I can get this …
Efficient and elegant way to get sub-range maximum values of a Pandas Series
Say I have a pandas Series: I have to get a series (or array) of subrange maximum values. For example, a subrange of 5. For the first element, the value should be max{2, 0, 8, 0, 1} = 8. The second value should be max{0, 8, 0, 1, 2} = 8. Starting from the 8th element, there are less than
How to securely pass credentials in python?
Passing login credentials into a python script for a website. However, I want the credentials to not be stored as plaintext in the .py files. How can I securely store the login credentials in a .py file so it can use them to login? Answer You can use an environmental file in your project root directory and lo…
Obfuscate file name and folder path
I am working on a git repo and I need to share folder hierarchy and file names to external vendor to perform some code analysis. I have whole hierarchy available in a csv file. Problem is that I cannot provide actual folder paths or file names as they contain protected information. For code analysis, external…
Applying custom function to groupby object keeps groupby column
I have a dataframe which as a column for grouping by and several other columns. Play dataframe: When using a groupby on this dataframe followed by a default function, the groupby column is set as an index and not included in the results: But when I define a custom function and use apply, I get an unwanted add…
Storing outputs from input parameters into the rows of a panda data frame
I have a list containing values that I want to perform mathematical operations on with different input parameters that are also stored in a list. For each value in the list, I want to store the results from performing the operation – with each distinct input parameter – row-by-row, where each row …
Python Pandas to_datetime Without Zero Padded
I am trying to convert a date & time string using Pandas ‘to_datetime’, but the string values is non-zero padded: I have the following but get a mismatch error Is there a way to add the zero padding or have ‘to_datetime’ accept the above formatting? Answer The trouble isn’t i…