File "/Users/samuel.kim/.pyenv/versions/2.7.12/lib/python2.7/site-packages/flask/app.py", line 1051, in add_url_rule

    'existing endpoint function: %s' % endpoint)

AssertionError: View function mapping is overwriting an existing endpoint function: xxx

api.add_resource(AuthServiceController,'/authorization') 

api.add_resource(AuthServiceController,'/authentication') 

>>> import datetime

>>> today = datetime.datetime.now()

>>> str(today)

'2018-01-23 14:49:37.284361'

>>> repr(today)

>>> f=1.1111111111111111

>>> str(f)

'1.11111111111'

>>> repr(f)

'1.1111111111111112'

https://docs.python.org/3.7/reference/datamodel.html#object.__repr__

object.__repr__(self)

Called by the repr() built-in function to compute the “official” string representation of an object. If at all possible, this should look like a valid Python expression that could be used to recreate an object with the same value (given an appropriate environment). If this is not possible, a string of the form <...some useful description...> should be returned. The return value must be a string object. If a class defines __repr__() but not __str__(), then __repr__() is also used when an “informal” string representation of instances of that class is required.

This is typically used for debugging, so it is important that the representation is information-rich and unambiguous.

object.__str__(self)

Called by str(object) and the built-in functions format() and print() to compute the “informal” or nicely printable string representation of an object. The return value must be a string object.

This method differs from object.__repr__() in that there is no expectation that __str__() return a valid Python expression: a more convenient or concise representation can be used.

The default implementation defined by the built-in type object calls object.__repr__().

>>> import datetime

>>> datetime.datetime.now()

datetime.datetime(2017, 11, 20, 11, 27, 46, 820594)

>>> datetime.datetime.now() - datetime.datetime(2017, 12, 25)

datetime.timedelta(-35, 41357, 474997)

>>> datetime.datetime(2017,12,25)-datetime.datetime(2017,11,20)

datetime.timedelta(35)

>>> datetime.datetime.now().timestamp()

1511145029.058472

>>> datetime.datetime.now()- datetime.timedelta(days=7)

datetime.datetime(2017, 11, 13, 11, 35, 24, 933742)

echo '{"url":"http:\/\/search.google.com\/api/v2/keyword", "param":"abc"}' | python -mjson.tool

{

    "url": "http://search.google.com/api/v2/keyword",

    "param": "abc"

}

 {%- for hostname, stat in stat.iteritems() %}

jinja2.exceptions.UndefinedError: 'dict object' has no attribute 'iteritems'

$ virtualenv envname

$ virtualenv -p python3 envname

gevent/gevent.corecext.c:5:20: fatal error: Python.h: No such file or directory
#include "Python.h"
^
compilation terminated.
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

            if not self.conn.connected:

                retry_count += 1

>>> result = ""

>>> str(type(result))

"<class 'str'>"

>>> result.decode('utf-8')

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

AttributeError: 'str' object has no attribute 'decode'

>>>

https://docs.python.org/3/howto/unicode.html