Python之数字的格式化输出

需求：

将数字格式化后输出，并控制数字的位数、对齐、千位分隔符和其他的细节

x = 1234.56789
# Two decimal places of accuracy
print(format(x, '0.2f')) # '1234.57'

# Right justified in 10 chars, one-digit accuracy
print(format(x, '>10.1f'))  # '1234.6'

# Left justified
print(format(x, '<10.1f'))  # '1234.6    '

# Centered
print(format(x, '^10.1f'))  # 1234.6

# Inclusion of thousands separator
print(format(x, ','))  # '1,234.56789'
print(format(x, '0,.1f'))  # '1,234.6'

二八十六进制整数

x=1234
print(bin(x))  # 0b10011010010
print(oct(x))  # 0o2322
print(hex(x))  # 0x4d2
# 去掉进制的前缀，可以用format
print(format(x,"b"))  #
print(format(x,"o"))  #
print(format(x,"x"))  # 4d2