vars(),__main__,%,format

"""
iaksdhkasdh
"""
#vars()返回对象object的属性和属性值的字典对象。
print(__doc__)#注释
print(__file__)#路径
from lib import account
print(account.__package__)#当前py文件在哪个文件夹下
print(vars())
print(account.__cached__)#缓存，pyc文件
def xx():
    print("执行")
#只有本文件执行时，name等于main，否则等于模块名
#如果不写的话，换一个文件导入本模块后，文件执行模块里就执行
#xx() import 模块，等于加载模块的全部进缓存
if __name__ == '__main__':
    xx()

# %[(name)][flags][width].[precision]typecode
# s = "i am %s,age %d" % ('alex',18)#s字符串d数字
# s = "i am %(n1)+10s" % {"n1":"jbk"}
# s = "i am %.1f" % 1.33#保留一位小数
#s = "i am %.1f %%" % 50.33#当字符串存在格式化标志时，用%%表示%

#[[fill]    align]     [sign] [#]  [0]    [width][,]              [.precision][type]
#空白填充 对齐方式<>^  +-空格 进制 引索   宽度   为数字添加分隔符 精度        类型
# 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: {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)