I have defined a custom Exception object and would like to get the line number of the exception. Now, if there is a exception in something() it throws the FlowException but it does not give me the exact line number, How can I get the line number from FlowException(ie; it failed when it executed 2/0)? Here is …
Tag: python-2.7
Replace the color of block in gray scale image in Python
I have an Image of 128×128 pixels in which, there are 1024 blocks of 4×4 pixels each. If the coordinates of the first block areblock1= im[0:4, 0:4], then I want to replace the colour of pixels into a specific pixel intensity(or colour),example-128. So what I want to do is I want to change the colour…
How to get() a widget’s IntVariable value from the widget?
I am trying to get the value of a Tkinter.Checkbutton’s variable using .get(), but I get an error. I tried plenty of combinations of everything I’ve seen all over stackoverflow and other tutorial sites. The error I get is: It should be an IntVar, not a _tkinter.Tcl_Obj object, which doesn’t …
Divide the image into 4×4 blocks and save each coordinate in variable
I have an grayscale Image of 128×128 that I want to divide into 4×4 pixel non-overlapping blocks and I want to save coordinate of each pixel as variable like this- I know I can do it manually by defining variables, but I can use any for loop for making it faster? After that, I’ll find mean of …
Pandas DataFrame.to_csv raising IOError: No such file or directory
Hi: I am trying to use the Pandas DataFrame.to_csv method to save a dataframe to a csv file: However I am getting the error: Shouldn’t the to_csv method be able to create the file if it doesn’t exist? This is what I am intending for it to do. Answer to_csv does create the file if it doesn’t …
Convert each row of pandas DataFrame to a separate Json string
I use this code in order to convert each row of pandas DataFrame df into Json string. The problem is that it’s printing None, however df.head() prints out the data. How to get each row as a Json string variable and print it out? The Json string’s structure is plain, no arrays, just string, integer…
In JSON output, force every opening curly brace to appear in a new separate line
With json.dumps(some_dict,indent=4,sort_keys=True) in my code: I get something like this: But I want something like this: How can I force each opening curly brace to appear at the beginning of a new separate line? Do I have to write my own JSON serializer, or is there a special argument that I can use when ca…
No FileSystem for scheme: s3 with pyspark
I’m trying to read a txt file from S3 with Spark, but I’m getting thhis error: This is my code: This is the full traceback: How can I fix this? Answer If you are using a local machine you can use boto3: (do not forget to setup your AWS S3 credentials). Another clean solution if you are using an AW…
How can I increase the maximum query time?
I ran a query which will eventually return roughly 17M rows in chunks of 500,000. Everything seemed to be going just fine, but I ran into the following error: Obviously such a query can be expected to take some time; I’m fine with this (and chunking means I know I won’t be breaking any RAM limitat…
How to replace a word to another word in a list python?
If I have this list: Is it possible to replace every world to any other word without using any auto command, I am thinking about something like this: Answer You can use a list comprehension with an if-else. You now have a new list, list_B, where all instances of the word “world” have been replaced…