Doing the Udacity Intro to Backend course and learning basic webapp2. Relatively new to programming so I'll try to be clear. Using 64-bit Windows 7 Professional, if that matters.
One thing to note - I mostly use Python 3.6 (Anaconda) but am running 2.7 in a virtual environment. I'm not great with Python 2 and this is my first time using virtualenv.
I have a helloworld.py file which includes a class called MainPage that inherits from webapp2.RequestHandler and which contains function definitions for get and post. The file has an HTML form that asks a user to enter their birthday month, day, and year in three separate fields. There is also a submit button.
When the user enters their information, the validity of each the day, month, and year should be verified by a separate function (all three are in a separate module called verify_date). Each function basically checks that the information makes sense (no nonsense words or out-of-range dates). I am aware it doesn't enforce the differing lengths of months (eg Feb having only 28 days), but am not concerned with that.
1) If the user-entered information is valid ('January', '1', and '2000', for example) the page should accept the information and load a message that says, "Thanks for the Validation!" This works.
2) If any of the three pieces information is invalid, it should reload the form so that the user can re-enter everything. That's the issue. If I enter an out-of-range number for day or year, this works. But if I enter a made-up word into the "month" field, it A) loads the validation statement anyway, and B) writes "December" to the web page (I added a test statement) regardless of what is actually entered. For example, I could enter "April" into the box and it still prints "December." What's going on here?
NOTE: I tested the day/month/year verification functions independently in another IDE running Python 3.6, and they worked perfectly.
# helloworld.py
import webapp2
import verify_date
form = """
<form method="post">
What is your birthday?
<br>
<label>Month
<input type="text" name ="month">
</label>
<label>Day
<input type="text" name ="day">
</label>
<label>Year
<input type="text" name ="year">
</label>
<br>
<br>
<input type="submit">
</form>
"""
class MainPage(webapp2.RequestHandler):
def get(self):
#self.response.headers['Content-Type'] = 'text/plain'
self.response.out.write(form)
def post(self):
user_month = verify_date.valid_month(self.request.get('month'))
user_day = verify_date.valid_day(self.request.get('day'))
user_year = verify_date.valid_year(self.request.get('year'))
# Test: always prints what was actually entered in the field,
# as expected, even if it's gibberish
self.response.out.write(self.request.get('month'))
# Should return the month entered (capitalized by verify_date.valid_day)
# Prints December, regardless of what's entered
self.response.out.write(user_month)
# As expected, prints the entered day if in range. Reloads form otherwise
self.response.out.write(user_day)
# As expected, prints the entered day if in range. Reloads form otherwise
self.response.out.write(user_year)
if not(user_month and user_year and user_day):
self.response.out.write(form)
else:
self.response.out.write("Thanks for the validation!")
# Test: prints the entered month, even if gibberish
self.response.out.write(self.request.get('month'))
app = webapp2.WSGIApplication([
('/', MainPage),
], debug=True)
# verify_date.py
def valid_month(month):
months = ['January','February','March','April','May','June','July','August','September','October','November','December']
months = [month.lower() for month in months]
month = month.lower()
if month in months:
month = month[0].upper() + month[1::]
else:
print 'Sorry, that is a not a valid month.'
month = None
return month
def valid_day(day):
if day.isdigit() and int(day) < 32 and int(day) > 0:
day = int(day)
else:
day = None
return day
def valid_year(year):
if year.isdigit() and int(year) < 2021 and int(year) > 1899:
year = int(year)
else:
year = None
return year
