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ã¿ãã«ã¯äžèšã®ãããªè€æ°ã®ããŒã¿ãã²ãšã€ã«ãŸãšããããã®åã§ããåãããšããªã¹ãã§ãå®çŸã§ããŸããããªã¹ãã¯ãå¯å€é·(é·ããå€ãã)ããªã®ã§ãè€æ°ã®ããŒã¿ãåããã£ãŠã¯ãããŠæå³ãæã€å Žåã®å©çšã¯æ¬æ¥ã®çšéã§ã¯ãªãããããããåãããŒã¿ãããã€ãæ ŒçŽããçšéã§äœ¿ãããŸãã
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ã¿ãã«ãã©ããããã®ãæèŠçã«ããã£ãŠããã ãããšæãã®ã§ãå ·äœçã«ã©ã®ããã«äœ¿ãã®ã説æããŸããããã¿ãã«ã®äœæã¯ã¿ãã«ã®èŠçŽ ãšãªãå€ã () ã§å²ãããšã§äœæã§ããŸããtype颿°ã¯åã確èªããããã«å©çšãã颿°ã§ãã
>>> a = ('taro','1986','tokyo')
>>> type(a)
<type 'tuple'>
äžèšã¯å ã»ã©ã®äŒå¡æ å ±ã®ã¿ãã«ã§ããããã®èŠçŽ ãžã®åç §ã¯ãªã¹ãã«äŒŒãŠããŸãã
>>> a = ('taro','1986','tokyo')
>>> a[0]
'taro'
>>> len(a)
3
>>> for i in a:
âŠâŠ print(i)
taro
1986
tokyo
ãã ãããªã¹ããšç°ãªãäžåºŠäœæããããªããžã§ã¯ãã¯å€æŽããããšã¯ã§ããŸããã
>>> a = ('taro','1986','tokyo')
>>> a[0] = 5
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'tuple' object does not support item assignment
å°ãããªãããŒã§ãããã¿ãã«å ã®èŠçŽ ãäžæ°ã«ååŸããããšãã§ããŸãã
a = ('taro','1986','tokyo')
(b,c,d) = a
print(b) # taro
print(c) # 1986
print(d) # tokyo
ã¿ãã«ã¯Cèšèªã§ãããæ§é äœããJavaã§ãããã¯ã©ã¹ã®ã¡ã³ã颿°ãã®ç°¡æçãšããŠäœ¿ãã®ãäž»ãªçšéã§ãããã ããæ§é äœãã¡ã³ã颿°ã¯ããããã倿°åããæã£ãŠããã®ã«å¯ŸããŠãã¿ãã«ã¯ãäœçªç®ã«ããèŠçŽ ãããšããããšãåºæºã«ããŠããŒã¿ã管çããŸããåœç¶ãªããããã°ã©ã ã®ä¿®æ£ãªã©ã§ã¿ãã«ã®æ§é ã倿Žããéã«ã¯æ°ãã€ããŠãã ããã
æåŸã«ã¿ãã«ã®äŸ¿å©ãªäœ¿ãæ¹ã玹ä»ããŸããããŸãæ©äŒã¯å€ããªãã®ã§ããã颿°ã®è¿ãå€ã2ã€è¿ãããå Žåããšãã©ãçºçããŸããäžã€ã²ãšã€å¥ã®é¢æ°ã«åããŠå€ãååŸããããã«ããããšãã§ããŸãããããšãã°foræã§ã®æ¢çŽ¢ã®ãããªããã°ã©ã ã ãšèšç®ã³ã¹ããé«ããããç¡é§ã«2åšããã®ã¯é¿ããã»ããããã§ãããã®ãããªãšãã«ã¿ãã«ãreturnã§äœ¿ããšäŸ¿å©ã§ããããšãã°ãæå°å€ãšæå€§å€ãååŸãã颿°ã ãšãè¿ãå€ã¯2ã€è¿ããããšããã§ãããã®ãããªå Žåã¯ä»¥äžã®ããã«ããã°å€§äžå€«ã§ãã
def get_min_max(a):
mi = a[0]
ma = a[0]
for i in a:
if(i < mi): mi = i
if(ma < i): ma = i
return (mi, ma)
a = [5,8,1,4,10,3,7]
(mi, ma) = get_min_max(a)
print("min: " + str(mi))
print("max: " + str(ma))
è¿ãå€ãã¿ãã«ã«ããéã¯ãã¿ãã«ã®æ§é ã«æ°ãã€ããŠå©çšããŠãã ãããããªãã§ãããã§ãã¿ãã«ã«ããã®ã¯ãããã»ããããã§ãã
ã»ãã
次ã¯ãã»ãããã§ããã»ãããäžèšã§èª¬æãããšããéåããšããæŠå¿µãå®çŸããããã®åã§ããããšãã°ããã空ã®éåã«Aã远å ãããšããã®éåã«ã¯AããããŸããããã«Bã远å ãããšAãBã®2ã€ãååšããŸããããããããã«ããã«Aã远å ããŠãããAãAãBããšã¯ãªããã«ãAãBãã®ãŸãŸã§ãããããŠéåã¯é åºãæããªãã®ã§ãAãBããããBãAããåãæå³ãæã¡ãŸãã
ã»ããã®å éšå®è£ ã«ã¯éåžžã«éèŠãªæŠå¿µãããã®ã§ããããšããããäœ¿ãæ¹ã説æããŠããŸããŸãã空ã®ã»ããã®ããŒã¿(ãªããžã§ã¯ã)ã®äœæã¯set()颿°ã䜿ããŸãããããã¯ãªã¹ãã®ããŒã¿ãset颿°ã«æž¡ãããšã§ãäžèº«ã®ããã»ãããäœãããšãã§ããŸãã
>>> a = set()
>>> b = set([1,3,5,7])
>>> print(b)
set([1, 3, 5, 7])
èŠçŽ ã®è¿œå ã«ã¯addãåé€ã«ã¯remove颿°ã䜿ããŸãã
>>> b.add(2)
>>> b.remove(5)
>>> print(b)
set([1, 2, 3, 7])
ãªã¹ãã®ããŒã¿è¿œå ã®é¢æ°å(æ£ç¢ºã«ã¯ã¡ãœããå)ãèŠããŠããŸãããaddã§ã¯ãªããappendã§ããããå°ã现ãã話ãšãªãã®ã§ãããæ¥æ¬èªã§èšããšåãã远å ãã§ãã£ãŠããaddã ãšãéåã«å ããããšããæãã§ãappendã ãšãæ«å°Ÿã«å ããããšããæå³åãã«ãªããŸããè©±ãæ»ããšãremove颿°ã䜿ããšæå®ããå€ãã»ããããåãé€ããŸããååšããªãå€ãæå®ãããšãšã©ãŒã«ãªãã®ã§æ³šæããŠãã ããã
æåŸã«èŠçŽ ã®ååšã®æç¡ã®ç¢ºèªæ¹æ³ãšãããŒã¿ããªã¹ãã«ããæ¹æ³ã瀺ããŸãã
>>> a = set([1,3,5,7,9])
>>> 3 in a
True
>>> 10 in a
False
>>> list(a)
[1, 3, 9, 5, 7]
ãªããšãªãäœ¿ãæ¹ã¯ããã£ãŠããã ããã§ããããã远å ãåé€ãæç¡ã®ãã§ãã¯ãªã©ã®æ©èœãèŠããšããªãã ããªã¹ãã«äŒŒãŠãããããªæ°ããããããããŸããããä»çµã¿ã¯ãŸã£ããç°ãªã£ãŠããŸããä»çµã¿ã«ã€ããŠã¯æ¬¡é ç®ã§èª¬æããŸãã
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äŸããããŠèª¬æããŸããããæç©(Key)ãšè²(Value)ã®èŸæžãªããžã§ã¯ããäœããšãããšã
- ããã(Key) : èµ€è²(Value)
- ã¬ã¢ã³ : é»è²
- ã¶ã©ã : 玫
- ãããã㌠: èµ€è²
ãšãããã¢ãäœããŸããèŸæžåã䜿ããšããããããšæå®ããã°ãèµ€è²ããåŸããããã¶ã©ãããšæå®ããã°ã玫ããåž°ã£ãŠããŸããå ã»ã©ã®ã»ãããšåãããã«ããããããšããããŒã¯éè€ãèš±ãããã«ã²ãšã€ããååšããããšãã§ããªãããããããã : ç·è²ããšãããã¢ãæ¹ããŠç»é²ãããšæã®ããŒã¿ã¯äžæžããããŠãªããªã£ãŠããŸããŸãããã ãäŸã«ããããããããšããããããŒããèŠãã°ãããããã«å€(Value)ã®éè€ã¯èš±ãããŠããŸãã
åã®ããããã§ããã°èŸæžåã®ããã¿ã®æ³åãã€ãããããããŸããããç°¡åã«ãã£ãŠããŸããšãã»ããã«ãããããã·ã¥ã®äœ¿ãæ¹ã«ãValueã远å ãããŠããã ãã§ããã
ãJohn SmithããããŒãšããŠæå®ãããšããã·ã¥é¢æ°ã§ã02ããåŸãããã02ãã®ãªããããJohn Smithãã®ValueãååŸããŠããŸãã
ããã§ã¯ãã£ããèŸæžåãå©çšãããµã³ãã«ããã°ã©ã ãæžããŠã¿ãŸãããŸãã¯èŸæžãªããžã§ã¯ãã®çæã§ãã
>>> a = dict()
>>> type(a)
<type 'dict'>
>>> b = {}
>>> type(b)
<type 'dict'>
>>> c = {"apple":"red", "lemon":"yellow"}
>>> type(c)
<type 'dict'>
èŸæžãªããžã§ã¯ãã®çæã«ã¯dict()颿°ãäœ¿ãæ¹æ³ãšããªã¹ãã«ããã [] ã«è¿ã {} èšå·ã䜿ããšããæ¹æ³ããããŸãã {} ã䜿ãå Žåã¯ãã®å éšã§
key:value
ãšããçµã¿åãããã³ã³ãåºåãã§åæãããšããã®ãã¢ã远å ãããèŸæžãªããžã§ã¯ããåŸãããŸãããªã¹ãã®çæã«äŒŒãŠããŸããã
次ã«èŸæžãªããžã§ã¯ããæäœããŠã¿ãŸãã
>>> c = {"apple":"red", "lemon":"yellow"}
>>> c['apple']
'red'
>>> c['apple'] = 'green'
>>> c['apple']
'green'
>>> c['banana']
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
KeyError: 'banana'
>>> c['banana'] = 'yellow'
>>> c['banana']
'yellow'
ããŒã䜿ã£ãå€ã®ååŸãããŒãšå€ã®ãã¢ã®ç»é²ãè¡ã£ãŠããŸãããªã¹ãã«ãããã€ã³ããã¯ã¹çªå·ãããŒåã«å€ãã£ãŠããã ãã§ããã"èŸæžãªããžã§ã¯ã[ããŒ]" ãšããŠããŒãæå®ããããšã§ã察å¿ããå€(Value)ãåç §ããŸããååšããªãããŒãåç §ããããšãããšåœç¶ãšã©ãŒãšãªããŸãã
ããŒã®ååšã®ç¢ºèªã¯ã»ãããšåæ§ã§ãã
>>> c = {"apple":"red", "lemon":"yellow"}
>>> 'apple' in c
True
>>> 'banana' in c
False
颿°ã䜿ã£ãã¢ã¯ã»ã¹ãã§ããŸãã
>>> c.has_key('apple')
True
>>> c.get('apple')
'red'
ã»ãã«ããããŒäžèЧã®ååŸãªã©ããã䜿ããŸããå€äžèЧã®ååŸã¯ããã»ã©äœ¿ããªããããããªãã§ãã
>>> c.keys()
['lemon', 'apple', 'banana']
>>> c.values()
['yellow', 'red', 'yellow']
ã»ãã«ãèŸæžåã®äœ¿ãæ¹ã«ã¯ãããããããŸããããŸãã¯ãã®ããããã䜿ãããªããã°ååã§ãããã
颿°å
ä»åã®æåŸã®åã¯é¢æ°åã§ããããã颿°ã¯é¢æ°ã§ãã£ãŠåãããªãã§ãã?ããšæããããããããã£ããããããããŸããããPythonã§ã¯é¢æ°ãåã®äžçš®ã§ããè«ãã蚌æ ã§ããã£ããäŸã瀺ããŸãããã
>>> def test():
âŠâŠ return 1
âŠâŠ
>>> type(test)
<type 'function'>
>>>
>>> test2 = test
>>> type(test2)
<type 'function'>
åã'function'ãšã§ãŠããŸããã颿°åã§ãããããã颿°ãåã ãšããã£ããšããã§ãå®éã«ã©ã®ããã«äœ¿ããæ³åãã€ããªããããããŸããããåå¿è ã®åãè¶ ããŠããŸããããããªãã§ãããç¥ã£ãŠãããŠãããããå 容ã§ãã®ã§ã話ããŸãã
ãŸãæåã«é¢æ°æž¡ããšåŒã°ãã颿°åã®äœ¿ãæ¹ã§ãã
def fun1(fun, x):
fun(x)
def fun2(x):
print('fun2 : ' + str(x))
fun1(fun2, 5) # "fun2 : 5" ãšè¡šç€ºããã
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def adder(x):
def fun(y):
return x + y
return fun
adder5 = adder(5)
print(adder5(10)) # 15
adder7 = adder(7)
print(adder7(10)) # 17
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def fun(y):
return 5 + y
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