1、百分號(hào)方式
%[(name)][flags][width].[precision]typecode
注:Python中百分號(hào)格式化是不存在自動(dòng)將整數(shù)轉(zhuǎn)換成二進(jìn)制表示的方式
常用格式化:
tpl = "i am %s" % "alex"
tpl = "i am %s age %d" % ("alex", 18)
tpl = "i am %(name)s age %(age)d" % {"name": "alex", "age": 18}
tpl = "percent %.2f" % 99.97623
tpl = "i am %(pp).2f" % {"pp": 123.425556, }
tpl = "i am %.2f %%" % {"pp": 123.425556, }
2、format方式
[[fill]align][sign][#][0][width][,][.precision][type]
- fill 【可選】空白處填充的字符
- align 【可選】對(duì)齊方式(需配合width使用)
- <,內(nèi)容左對(duì)齊
- >,內(nèi)容右對(duì)齊(默認(rèn))
- =,內(nèi)容右對(duì)齊,將符號(hào)放置在填充字符的左側(cè),且只對(duì)數(shù)字類型有效。 即使:符號(hào)+填充物+數(shù)字
- ^,內(nèi)容居中 - sign 【可選】有無符號(hào)數(shù)字
- +,正號(hào)加正,負(fù)號(hào)加負(fù);
- -,正號(hào)不變,負(fù)號(hào)加負(fù);
- 空格 ,正號(hào)空格,負(fù)號(hào)加負(fù); -
【可選】對(duì)于二進(jìn)制、八進(jìn)制、十六進(jìn)制,如果加上#,會(huì)顯示 0b/0o/0x,否則不顯示
- , 【可選】為數(shù)字添加分隔符,如:1,000,000
- width 【可選】格式化位所占寬度
- .precision 【可選】小數(shù)位保留精度
- type 【可選】格式化類型
- 傳入” 字符串類型 “的參數(shù)
-s,格式化字符串類型數(shù)據(jù)
- 空白,未指定類型,則默認(rèn)是None,同s
- 傳入“ 整數(shù)類型 ”的參數(shù)
- b,將10進(jìn)制整數(shù)自動(dòng)轉(zhuǎn)換成2進(jìn)制表示然后格式化
- c,將10進(jìn)制整數(shù)自動(dòng)轉(zhuǎn)換為其對(duì)應(yīng)的unicode字符
- d,十進(jìn)制整數(shù)
- o,將10進(jìn)制整數(shù)自動(dòng)轉(zhuǎn)換成8進(jìn)制表示然后格式化;
- x,將10進(jìn)制整數(shù)自動(dòng)轉(zhuǎn)換成16進(jìn)制表示然后格式化(小寫x)
- X,將10進(jìn)制整數(shù)自動(dòng)轉(zhuǎn)換成16進(jìn)制表示然后格式化(大寫X)
傳入“ 浮點(diǎn)型或小數(shù)類型 ”的參數(shù)
- e, 轉(zhuǎn)換為科學(xué)計(jì)數(shù)法(小寫e)表示,然后格式化;
- E, 轉(zhuǎn)換為科學(xué)計(jì)數(shù)法(大寫E)表示,然后格式化;
- f , 轉(zhuǎn)換為浮點(diǎn)型(默認(rèn)小數(shù)點(diǎn)后保留6位)表示,然后格式化;
- F, 轉(zhuǎn)換為浮點(diǎn)型(默認(rèn)小數(shù)點(diǎn)后保留6位)表示,然后格式化;
- g, 自動(dòng)在e和f中切換
- G, 自動(dòng)在E和F中切換
- %,顯示百分比(默認(rèn)顯示小數(shù)點(diǎn)后6位)
常用格式化
tpl = "i am {}, age {}, {}".format("seven", 18, 'alex')
tpl = "i am {}, age {}, {}".format(*["seven", 18, 'alex'])
tpl = "i am {0}, age {1}, really {0}".format("seven", 18)
tpl = "i am {0}, age {1}, really {0}".format(*["seven", 18])
tpl = "i am {name}, age {age}, really {name}".format(name="seven", age=18)
tpl = "i am {name}, age {age}, really {name}".format(**{"name": "seven", "age": 18})
tpl = "i am {0[0]}, age {0[1]}, really {0[2]}".format([1, 2, 3], [11, 22, 33])
tpl = "i am {:s}, age {:d}, money {:f}".format("seven", 18, 88888.1)
tpl = "i am {:s}, age {:d}".format(*["seven", 18])
tpl = "i am {name:s}, age {age:d}".format(name="seven", age=18)
tpl = "i am {name:s}, age {age:d}".format(**{"name": "seven", "age": 18})
tpl = "numbers: {:b},{:o},{:d},{:x},{:X}, {:%}".format(15, 15, 15, 15, 15, 15.87623, 2)
tpl = "numbers: {:b},{:o},{:d},{:x},{:X}, {:%}".format(15, 15, 15, 15, 15, 15.87623, 2)
tpl = "numbers: {0:b},{0:o},{0:d},{0:x},{0:X}, {0:%}".format(15)
tpl = "numbers: {num:b},{num:o},{num:d},{num:x},{num:X}, {num:%}".format(num=15)