在for循环中返回第一个项目/迭代

Question

I have a list with several strings

myList = ['someFileName_red', 'someFileName_blue_v006', 'someFileName_green_v004']

I want to use this list as a search criteria to find image sequences with matching names on my server. These image sequences are located in all over the place on the server.

The root directory from which I will start my search is:

rootPath = r'C:\Users\userName\Desktop\Seq'

I'm trying to create a for loop that searches the volume by the myList and rootPath variables,but am finding it difficult to return the result of the for loop as the first item in the loop. Here's and example of what I'm trying to do:

for root, dirs, files in os.walk(rootPath):
    for x in shotList:
        for file in files:
            if file.startswith(x):
                if file.endswith('.exr'):
                    print os.path.join(root,file)

Which returns:

C:\Users\userName\Desktop\Seq\shot\images\someFileName_red.0101.exr
C:\Users\userName\Desktop\Seq\shot\images\someFileName_red.0102.exr
C:\Users\userName\Desktop\Seq\shot\images\someFileName_red.0103.exr
C:\Users\userName\Desktop\Seq\shot\images\someFileName_red.0104.exr
C:\Users\userName\Desktop\Seq\shot\images\someFileName_red.0105.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_blue\V006\Images\someFileName_blue_v006.0101.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_blue\V006\Images\someFileName_blue_v006.0102.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_blue\V006\Images\someFileName_blue_v006.0103.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_blue\V006\Images\someFileName_blue_v006.0104.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_blue\V006\Images\someFileName_blue_v006.0105.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_blue\V006\Images\someFileName_blue_v006.0106.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_blue\V006\Images\someFileName_blue_v006.0107.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_green\V004\Images\someFileName_green_v004.0101.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_green\V004\Images\someFileName_green_v004.0102.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_green\V004\Images\someFileName_green_v004.0103.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_green\V004\Images\someFileName_green_v004.0104.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_green\V004\Images\someFileName_green_v004.0105.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_green\V004\Images\someFileName_green_v004.0106.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_green\V004\Images\someFileName_green_v004.0107.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_green\V004\Images\someFileName_green_v004.0108.exr

What I want to get back is the first frame of the image sequences:

C:\Users\userName\Desktop\Seq\shot\images\someFileName_red.0101.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_blue\V006\Images\someFileName_blue_v006.0101.exr
C:\Users\userName\Desktop\Seq\shot\someFileName_green\V004\Images\someFileName_green_v004.0101.exr

Answer 1

You need to add a break after printing the first file and bellow:

for root, dirs, files in os.walk(rootPath):
    for x in shotList:
        for file in files:
            if file.startswith(x) and file.endswith('.exr'):
                print os.path.join(root,file)
                break