Holy Uni de
AR,
Pražské Pyvo
Nov, 2018
Who am I?
Alex Rembish. Siberian. Traveller. Team leader.
DevOps supporter. Python exterminator.
Who am I?
What's going on?
1st Grade Math
Lightning Talk
What's going on?
1st Grade Math
Lightning Talk
Quiz
Rules
- Slide (check title)
- Raise a hand
- Answer
- 5 secs discussion - rly?!
Question #1: Python 2.7
#! /usr/bin/env python2
prádelna = 2
á = 1
print(prádelna - á) # = ?Answer #1: Oops 2.7
prádelna = 2
^
SyntaxError: invalid syntax
Next code will not work as well:
# coding=utf8import sys
reload(sys)
sys.setdefaultencoding("utf8")
Q2: KISS principle
#! /usr/bin/env python3
A = 1
A = 2
print(A - A) # = ?A2: You didn't even try
#! /usr/bin/env python3
A = 1
A = 2
print(A - A) # = 0
Q3: Are you serious?
#! /usr/bin/env python3
Α = 1
A = 2
print(Α - A) # = ?A3: What the Hell?!
#! /usr/bin/env python3
Α = 1 # GREEK CAPITAL LETTER ALPHA
A = 2 # LATIN CAPITAL LETTER A
print(Α - A) # = -1
Q4: Bamboozling!
#! /usr/bin/env python3
Ａ = 1
A = 2
print(Ａ - A) # = ?A4: Getting bamboozled!
#! /usr/bin/env python3
Ａ = 1 # FULLWIDTH LATIN CAPITAL LETTER A
A = 2 # LATIN CAPITAL LETTER A
print(Ａ - A) # = 0
#! /usr/bin/env python3
ＡAＡA = 1
AＡAＡ = 2
print(globals())
# => {..., 'AAAA': 2}
Q5: Why not?
#! /usr/bin/env python3
print(not(True)) # = ?
Q5.1: Calm down
#! /usr/bin/env python3
print(not(True)) # = False
def nοt(x):
return x
print(nοt(True)) # = ?
A5: Calm down, I said
#! /usr/bin/env python3
print(not(True)) # = False
def nοt(x):
return x
print(nοt(True)) # = True
A5.1: Don't do it
#! /usr/bin/env python3
print(not(True)) # = False
def nοt(x): # Greek Capital Letter Omicron
return x
print(nοt(True)) # = True
def not(x):
^
SyntaxError: invalid syntax
Q6: Holy Cow!
#! /usr/bin/env python3
🐮 = 1
🍖 = 2
print(🐮 - 🍖) # = ?
A6: Unholy cow
#! /usr/bin/env python3
🐮 = 1
🍖 = 2
print(🐮 - 🍖) 🐮 = 1
^
SyntaxError: invalid character in identifier
A6.1:
$ pip install emoji-encoding# filename: emoji.py
#! /usr/bin/env python
# coding: emoji
🐮 = 1
🍖 = 2
print(🐮 - 🍖)from emojiencoding import bootstrap
import emoji # = -1Don't try it at work!
#! /usr/bin/env python3
from math import pi, sin
π = pi
α = π / 2.
print(sin(α)) # = 1.0But
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