Create file in all the directories in the current directory.

touchfileinalldirs.bash

# Create __init__.py in all the directories in the current directory.
# .
# ├── clique
# │   └── clique.py
# ├── __init__.py
# ├── metro
# │   └── metro.py
# ├── pop
# │   └── pop.py
# ├── service
# │   └── service.py
# └── switch
#     └── switch.py

for D in `find . -type d`; do
	touch $D/__init__.py;
done

# Result:
# .
# ├── clique
# |   ├── __init__.py
# │   └── clique.py
# ├── __init__.py
# ├── metro
# |   ├── __init__.py
# │   └── metro.py
# ├── pop
# |   ├── __init__.py
# │   └── pop.py
# ├── service
# |   ├── __init__.py
# │   └── service.py
# └── switch
#     ├── __init__.py
#     └── switch.py