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Process each file in a directory

python
import os
results = (process(f) for f in os.listdir(".") if os.path.isfile(f))
csharp
foreach (string filename in System.IO.Directory.GetFiles(directory)) ProcessFile(filename);
java
for (File file : (new File("c:\\")).listFiles()) process(file);

Process each file in a directory recursively

python
import os
results = (process(os.path.join(p, n)) for p,d,l in os.walk(".") for n in l)
java
processDirectory(new File("c:\\"));