====== python의 data type을 알아 볼까요 ======

https://docs.python.org/3/library/stdtypes.html
===== Built-In type =====

=== Boolean ===
  * bool

=== Numeric ===
  * int
  * float
  * complex

=== String ===
  * str

=== Sequence ===
  * list
  * tuple
  * range

=== Set ===
  * set
  * frozenset

=== Mapping ===
  * dict

=== Iterator ===
  *_<wrap>_</wrap>_iter_<wrap>_</wrap>()
  *_<wrap>_</wrap>_next_<wrap>_</wrap>_()
==== Hello World! ====
<code python 기초자료형>
# numeric
a = -1
b = 1.0
print(f"{type(a)} {a}")
print(f"{type(b)} {b}")
c = complex(101, 2)
print(f"{type(c)} {c}")

# string
s1 = """0123456789-abcd"""
print(f"{type(s1)} {s1} {s1[0::5]}")

# boolean
print(f"{type(False)} {True} {1 != 1}")

# List
kk = ['k', 'asdf', "김재성"]
print(f"{type(kk)} {kk}")

# Tuple
kk = ('k', 'asdf', "김재성")
print(f"{type(kk)} {kk}")

# Dictionary
kk = {'name':'maro', 'nation':'Korea'}
print(f"{type(kk)} {kk}, len: {len(kk)}")

</code>

** output **
<code bash>
<class 'int'> -1
<class 'float'> 1.0
<class 'complex'> (101+2j)
<class 'str'> 0123456789-abcd 05-
<class 'bool'> True False
<class 'list'> ['k', 'asdf', '김재성']
<class 'tuple'> ('k', 'asdf', '김재성')
<class 'dict'> {'name': 'maro', 'nation': 'Korea'}, len: 2
</code>