create init script to create challenge readme and dir structure

Author: pybites

init.py

@@ -0,0 +1,62 @@
+import datetime
+import os
+
+README = 'README.md'
+DAY_ZERO = datetime.datetime(2017, 3, 29)  # = PyBites 100 days :)
+NUM_DAYS = 100
+NUM_WIDTH = 3
+TITLE = 'PyBites 100 Days Of Code Challenge'
+HEADER = '''## {}
+
+Inpired by [Join the #100DaysOfCode](https://medium.freecodecamp.com/join-the-100daysofcode-556ddb4579e4#.qmiel1bhd).
+
+### Progress Log\n\n'''.format(TITLE)
+DAY = '* Day {0} - {1}: [SHORT_TITLE_SCRIPT]({0}) - learning: SUMMARY_YOUR_LEARNING\n'
+INIT_FILE = '__init__.py'
+AUTHOR = "__author__ = 'PyBites'\n"
+
+
+def gen_days():
+    '''Generate day range 001...100'''
+    for day in range(1, NUM_DAYS + 1):
+        yield str(day).zfill(NUM_WIDTH)
+
+
+def get_date(day):
+    '''Get date by offsetting nth day from day 0'''
+    date = DAY_ZERO + datetime.timedelta(int(day))
+    return date.strftime('%b %d, %Y')
+
+
+def create_readme():
+    '''Create readme file with progress log template'''
+    with open(README, 'w') as f:
+        f.write(HEADER)
+        for d in gen_days():
+            date = get_date(d)
+            f.write(DAY.format(d, date))
+
+
+def create_init(path):
+    '''Create init file so each day dir is package,
+    and gets committed to git from the start'''
+    initfile = os.path.join(path, INIT_FILE)
+    with open(initfile, 'w') as f:
+        f.write(AUTHOR)
+
+
+if __name__ == '__main__':
+    if os.path.isfile(README):
+        print('README already created')
+    else:
+        print('Creating README')
+        create_readme()
+
+    dirs = [d for d in gen_days() if not os.path.isdir(d)]
+    if not dirs:
+        print('All 100 days directories already created')
+    else:
+        print('Creating missing day directories')
+        for d in dirs:
+            os.makedirs(d)
+            create_init(d)