Selecting A folder Python

Question

I'm new to python and want to code for specific characteristics in folders and then perform operations on the contents within the desired folder. This is an example below:

Path = "./Desktop/Example/"          #Input Directory
A_files = []                                                                    
for dirName, subdirList, fileList in os.walk(Path):                            
    for filename in fileList:                                                       
        if "[A]" in subdirList()
        if ".txt" in filename.lower():                                                  
            A_files.append(os.path.join(dirName,filename)) 

#Perform Mathematical Operators for A_files only

B_files = []                                                                    
for dirName, subdirList, fileList in os.walk(Path):                            
    for filename in fileList:                                                       
        if "[B]" in subdirList()
        if ".txt" in filename.lower():                                                  
            B_files.append(os.path.join(dirName,filename))

 #Perform Mathematical Operators for B_files only

 #Perform Mathematical Operators between A_files and B_files together

In folder "Example" are sub folders: Hello_World[A] and Hello_World[B] and I want to access all .txt files in each folder individually at first to perform a scaling of the values. Later I do other mathematical operators between the two files.

Thank you for you help!

How do I select a folder based on only a part of the name? Like in the last if statement I am able to select only .txt files I only want to choose the folder that contain [A] in it — Tyler_Cork, Nov 10 '15 at 17:23
I think the `glob` module can do wildcard-style partial matching. I haven't used it myself. — Kevin, Nov 10 '15 at 17:24
The thing is I know over time the prefix is going to change but i know the [A] convention and the [B] convention will remain the same. I need to find a way to isolate Hello_World[A] and Hi_World[B] through the directories — Tyler_Cork, Nov 10 '15 at 17:35

score 0 · Accepted Answer · edited May 23 '17 at 12:29

I think you are asking for something like this:

Path = "./Desktop/Example/"          #Input Directory
A_files = []                                                                    
for dirName, subdirList, fileList in os.walk(Path):                            
    for filename in fileList:                                                       
        if "[A]" in dirName:
            if ".txt" in filename.lower():                                                  
                A_files.append(os.path.join(dirName,filename)) 

#Perform Mathematical Operators for A_files only

B_files = []                                                                    
for dirName, subdirList, fileList in os.walk(Path):                            
    for filename in fileList:                                                       
        if "[B]" in dirName:
            if ".txt" in filename.lower():                                                  
                B_files.append(os.path.join(dirName,filename))

 #Perform Mathematical Operators for B_files only
 for f in B:
     data = open(filename).read()
     # Do stuff

 #Perform Mathematical Operators between A_files and B_files together
 for index, file in enumerate(A):
     dataA = open(A[i]).read()
     dataB = open(B[i]).read()
     # Do something

Since dirname is a string, you can use in to check its contents.

Then, you can iterate over your A[] and B[] to do your math, and use enumerate to iterate over both using an index. See here: Accessing the index in Python 'for' loops

Selecting A folder Python

1 Answers1