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Would be great if someone can help me understand how flock functions. Lets says I have the below scenario:

I'm trying to understand how parallelization works in Durable Function. I have a durable function with the following code:

I understand that after calling fork() the child process inherits the per-process file descriptor table of its parent (pointing to the same system-wide open file tables). Hence, when opening a file in a parent process and then calling fork(), both the child and parent can write to that file without overwriting one another's output (due to a shared offset in the open-file table entry).

However, suppose that, we call open() on some file after a fork (in both the parent and the child). Will this create a separate entries in the system-wide open file table, with a separate set of offsets and read-write permission flags for the child (despite the fact that it's technically the same file)? I've tried looking this up and I don't seem to be able to find a clear answer.

I'm asking this mainly since I was playing around with writing to files, and it seems like only one the outputs of the parent and child ends up in the file in the aforementioned situation. This seemed to imply that there are separate entries in the open file table for the two separate open calls, and hence separate offsets, so the slower process overwrites the output of the other process.

To illustrate this, consider the following code:

I am a beginner in Data Science, so please sorry if my mistake is dumb.

Here, I have a loop which views my data frame and makes changes using .loc The problem is that the changes are not saved at the end. I checked every step, everything is processing right. I even checked the modified cell right after working on it (look below) and its gives the value I put into it. However, when the program finishes the my excel data frame is not changed at all.

Help please. Thank you in advance!

I have this code which prints multiple tables

I am using the code below to create a list of sentences from a file document. The function will return a list of sentences.

I have the below requirement . i am trying to run the condition in loop and its taking more time. is there a one time command anything which will not take more time to process a 70 MB file.

Requirement: if @pRECTYPE="SBSB" line contains @pSBEL_MCTR_RSN="XXX" tag then we need to copy and append that to next @pRECTYPE="SBEL record at the end of the line

File :note : in file there will be no blank lines. I have given enter to avoid line continuation

@pRUKE=dfgt@pRECTYPE="SMDR", @pCONFIG="Y" XXXXXXX

@pRUKE=dfgt@pRECTYPE="SBSB", @pGWID="1234", @pSBEL_MCTR_RSN="KX28", @pSBSB_9000_COLL=""

@pRUKE=dfgt@pRECTYPE="KBSG", @pKBSG_UPDATE_CD="IN", XXXXXXXXXXX

@pRUKE=dfgt@pRECTYPE="SBEL", @pSBEL_EFF_DT="01/01/2017", @pCSPI_ID="JKOX0001", @pSBEL_FI="A"

@pRUKE=dfgt@pRECTYPE="SBEK", @pSBEK_UPDATE_CD="IN",XXXXXXXXXXXXXXXXXXX

@pRUKE=dfgt@pRECTYPE="DBCS", @pDBCS_UPDATE_CD="IN",XXXXXXXXXXXXXXXXXXXXXXXXXX

@pRUKE=dfgt@pRECTYPE="MEME", @pMEME_REL="18", @pMEEL_MCTR_RSN="KX28"

@pRUKE=dfgt@pRECTYPE="ATT0", @pATT0_UPDATE_CD="AP",XXXXXXXXX

@pRUKE=dfgt@pRECTYPE="SBSB", @pGWID="1234", @pSBEL_MCTR_RSN="KX28", @pSBSB_9000_COLL=""

@pRUKE=dfgt@pRECTYPE="KBSG", @pKBSG_UPDATE_CD="IN", XXXXXXXXXXX

example :

Before : @pRUKE=dfgt@pRECTYPE="SMDR", @pCONFIG="Y" XXXXXXX

@pRUKE=dfgt@pRECTYPE="SBSB", @pGWID="1234", @pSBEL_MCTR_RSN="KX28", @pSBSB_9000_COLL=""

@pRUKE=dfgt@pRECTYPE="KBSG", @pKBSG_UPDATE_CD="IN", XXXXXXXXXXX

@pRUKE=dfgt@pRECTYPE="SBEL", @pSBEL_EFF_DT="01/01/2017", @pCSPI_ID="JKOX0001", @pSBEL_FI="A"

After:

@pRUKE=dfgt@pRECTYPE="SMDR", @pCONFIG="Y" XXXXXXX

@pRUKE=dfgt@pRECTYPE="SBSB", @pGWID="1234", @pSBEL_MCTR_RSN="KX28", @pSBSB_9000_COLL=""

@pRUKE=dfgt@pRECTYPE="KBSG", @pKBSG_UPDATE_CD="IN", XXXXXXXXXXX

@pRUKE=dfgt@pRECTYPE="SBEL", @pSBEL_EFF_DT="01/01/2017", @pCSPI_ID="JKOX0001", @pSBEL_FI="A", @pSBEL_MCTR_RSN="KX28"

if after SBSB, if there is no SBEL, then that SBSB can be ignored.

what i did is egrep -n "pRECTYPE="SBSB"|pRECTYPE="SBEL"" filename | sed '$!N;/pRECTYPE="SBEL"/P;D' | awk -F: '{print $1}' | awk 'NR%2{printf "%s,",$0;next;}1' > 4.txt;

by this i will get the line number eg: 2,4 17,19

line 9 12 14 will be ignored

while read line do

I'm trying to use BS4 to parse through the HTML for an about page on a youtube channel so I can scrape the number of channel views. Below is the code to scrape the channel views (located in the 'yt-formatted-string') and also the whole right column of the page. Both lines of code return either an empty list and a "None" value for the findAll() and find() functions, respectively.

I read another thread saying I may be receiving an empty list or "None" value because the page is accessing an API to get the total channel views to count and the values aren't actually in the HTML I'm parsing.

I know I could access much of this info through the Youtube API, but I want to iterate this code over multiple channels that are not my own. Moreover, I want to understand how to use BS4 to its full extent so I can replicate this process on an Instagram page or Facebook page.

Should I be using a different library that isn't BS4? Is what I'm looking to accomplish even possible?

My CODE

I'm attempting to write a scraper that will download attachments from an outlook account when I specify the path to folder to download from. I have working code but the folder locations are hardcoded as below:-