[B! tips][python] doe11ã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

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Python ã§æ–‡å—åˆ—ä¸ã®å¤‰æ•°ã‚’ãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆã—ã¦ç½®ãæ›ãˆã‚‹
1. %æ¼”ç®—å 2.3.6.2 æ–‡å—åˆ—ãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆæ“ä½œ ã«ã‚ˆã‚‹ã¨ã€ æ–‡å—åˆ—ãŠã‚ˆã³ Unicode ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã«ã¯å›ºæœ‰ã®æ“ä½œ: % æ¼”ç®—å (ãƒ¢ã‚¸ãƒ¥ãƒ) ãŒã‚ã‚Šã¾ã™ã€‚(â€¦) format % values (format ã¯æ–‡å—åˆ—ã¾ãŸã¯ Unicode ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆ)ã¨ã™ã‚‹ã¨ã€format ä¸ã® % å¤‰æ›æŒ‡å®šã¯ values ä¸ã®ã‚¼ãƒå€‹ã¾ãŸã¯ãã‚Œä»¥ä¸Šã®è¦ç´ ã§ç½®æ›ã•ã‚Œã¾ã™ã€‚ ã†ãƒ¼ã‚€ã€%æ¼”ç®—åã¨ã„ã†ç‹¬è‡ªã®ã‚‚ã®ãŒã‚ã‚‹ã®ã‹ã€‚(@_@;) 2. æ•°å€¤ã§ç½®ãæ›ãˆã‚‹ æ–‡å—åˆ—ã®ä¸ã®å¤‰æ•°ãŒä¸€ã¤ã®å ´åˆã€ a = 100 b = -200 print "Hello! %d" % a çµæžœã€ Hello! 100 ã‚¿ãƒ—ãƒ«ã€ãƒžãƒƒãƒ—ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆ æ–‡å—åˆ—ã®ä¸ã«å¤‰æ•°ãŒäºŒã¤ä»¥ä¸Šã‚ã‚‹å ´åˆã€ã‚¿ãƒ—ãƒ«ã€ãƒžãƒƒãƒ—ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã‚’ä½¿ã†ã€‚ # ã‚¿ãƒ—ãƒ« print "Hello! %d %d" % (a, b) # ãƒžãƒƒãƒ—ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆ pri
doe11 2010/03/09
""%() ãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆã«ã¦ 0ã§æ•°å€¤ã®å·¦ã‚’åŸ‹ã‚ã‚‹ï¼š " %03d " % ( i )

python

tips
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ãƒªã‚¹ãƒˆ - ä½œæˆã€å–ã‚Šå‡ºã—ã€ç½®æ›ã€è¿½åŠ ã€æ¤œç´¢ã€å‰Šé™¤ã€è¦ç´ æ•° - ã²ããƒ¡ãƒ¢
ä½œæˆ >>> list = ["a", "b", "c", "d", "e"] >>> list ['a', 'b', 'c', 'd', 'e'] å–ã‚Šå‡ºã— >>> list = ["a", "b", "c", "d", "e"] # nç•ªç›®ã®è¦ç´ ã‚’å–ã‚Šå‡ºã™ >>> list[0] 'a' # ã‚¤ãƒ³ãƒ‡ã‚¯ã‚¹ãŒè² ã®æ•°ã ã¨å¾Œã‚ã‹ã‚‰æ•°ãˆã‚‹ >>> list[-1] 'e' # ç¯„å›²å¤–ã®ã‚¤ãƒ³ãƒ‡ã‚¯ã‚¹ã‚’æŒ‡å®šã™ã‚‹ã¨ã‚¨ãƒ©ãƒ¼ >>> list[10] Traceback (most recent call last): File "<stdin>", line 1, in <module> IndexError: list index out of range # nç•ªç›®ã‹ã‚‰m-1ç•ªç›®ã®è¦ç´ ã‚’å–ã‚Šå‡ºã™ >>> list[1:4] ['b', 'c', 'd'] # å§‹ç‚¹ã‚’çœç•¥ã™ã‚‹ã¨0ç•ªç›®ã‹ã‚‰ >>> lis
doe11 2010/02/04
python

tutorial

tips
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Python ã§æ£ç¢ºãªå°æ•°ã®è¨ˆç®— (3) â€“ float, Decimal ã®æœ‰åŠ¹æ¡æ•° | ã™ãã«å¿˜ã‚Œã‚‹è„³ã¿ãã®ãŸã‚ã®ãƒ¡ãƒ¢
1. float, Decimal ã®æœ‰åŠ¹æ¡æ•°ã‚’ç¢ºèªã—ã¦ãŠã ã“ã‚Œã¾ã§ã« ã€Œfloat ã‚ˆã‚Šã‚‚ç²¾åº¦ã®é«˜ã„ Decimalã€ ã€ã€ŒDecimal ã‚’æ–‡å—åˆ—ã¨ã—ã¦å‡ºåŠ›ã™ã‚‹ã¨ãã® str() ã¨ repr() ã®é•ã„ã€ã«ã¤ã„ã¦è¦‹ã¦ããŸã€‚ Python ã§æ£ç¢ºãªå°æ•°ã®è¨ˆç®— (1) - Decimal ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã‚’ä½¿ã† Python ã§æ£ç¢ºãªå°æ•°ã®è¨ˆç®— (2) - Decimal ã®å€¤ã‚’æ–‡å—åˆ—ã«ã—ã¦ã€eval () ã§è©•ä¾¡ã™ã‚‹ã¨ãã¯ repr é–¢æ•°ã‚’ä½¿ã† ä»Šå›žã¯ã€float ã¨ Decimal æœ‰åŠ¹æ¡æ•°ã€str() ã¨ repr() ã®æœ‰åŠ¹æ¡æ•°ã«ã¤ã„ã¦è©¦ã—ã¦ãŠãã€‚ã“ã†ã„ã†ã®ã¯ã€ä¸€åº¦è‡ªåˆ†ã§å‹•ä½œã‚’ç¢ºèªã—ã¦ãŠã‹ãªã„ã¨æ°—æŒã¡ãŒæ‚ªã„ã€‚ (+_+) 2. äº‹å‰æº–å‚™ æ¯Žå›ž print æ–‡ã§ã€å¼ã¨çµæžœã‚’æ›¸ãã®ã¯é¢å€’ã€‚äºˆã‚ã€ä¸Žãˆã‚‰ã‚ŒãŸå¼ã®æ–‡å—åˆ—ã‚’å—ã‘ã¨ã‚‹ã¨ã€str() ã¨ repr() ã®çµæžœã‚’è¡¨ç¤ºã™ã‚‹é–¢æ•°ã‚’ä½œæˆã—ã¦
doe11 2010/01/31
python

tips
ãƒªãƒ³ã‚¯
æ–‡å—åˆ—ã®æ“ä½œ - ã²ããƒ¡ãƒ¢
æ–‡å—åˆ—ã®ãƒ¡ã‚½ãƒƒãƒ‰ã¯æ£è¦è¡¨ç¾ã‚’ä½¿ã†ã‚ˆã‚Šé€Ÿã„ã®ã§ã€æ–‡å—åˆ—ã®æ“ä½œã‚’ã™ã‚‹å ´åˆã¯ã€ã¾ãšæ–‡å—åˆ—ã®ãƒ¡ã‚½ãƒƒãƒ‰ã§ã§ããªã„ã‹ã‚’èª¿ã¹ãŸæ–¹ãŒã‚ˆã„ã§ã™ã€‚ æ–‡å—åˆ—ã®ä¸€éƒ¨ã‚’å–ã‚Šå‡ºã™ >>> s = "python" >>> s[2] # 2ç•ªç›®ã®è¦ç´ ã‚’å–ã‚Šå‡ºã™ 't' >>> s[1:4] # 1ç•ªç›®ã‹ã‚‰3ç•ªç›®ã¾ã§ã®æ–‡å—ã‚’å–ã‚Šå‡ºã™ 'yth' >>> print s[2:] # 2ç•ªç›®ã‹ã‚‰æœ«å°¾ã¾ã§ã®æ–‡å—ã‚’å–ã‚Šå‡ºã™ ãã‚“ >>> s[0] = "P" # æ–‡å—åˆ—ã¯ä¸å¤‰ãªã®ã§ã€è¦ç´ ã¸ã®ä»£å…¥ã¯ä¸å¯ Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'str' object does not support it em assignment æ–‡å—åˆ—ãŒâ—‹â—‹ã ã‘ã§ã‚ã‚‹ã‹ã‚’èª¿ã¹ã‚‹ >>> "abcABC123".isaln
doe11 2010/01/30
python

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tips
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