python中的operator库

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这个模块提供了一系列的函数操作。比如，operator.add(x, y)等于x+y

a = [1,2,3]
b = [5,6,7]
c = map(operator.mul, a, b)
c的值就为[5, 12, 21]

    abs(...)
        abs(a) -- Same as abs(a).

    add(...)
        add(a, b) -- Same as a + b.

    and_(...)
        and_(a, b) -- Same as a & b.

    concat(...)
        concat(a, b) -- Same as a + b, for a and b sequences.

    contains(...)
        contains(a, b) -- Same as b in a (note reversed operands).

    countOf(...)
        countOf(a, b) -- Return the number of times b occurs in a.

    delitem(...)
        delitem(a, b) -- Same as del a[b].

    delslice(...)
        delslice(a, b, c) -- Same as del a[b:c].

    div(...)
        div(a, b) -- Same as a / b when __future__.division is not in effect.

    eq(...)
        eq(a, b) -- Same as a==b.

    floordiv(...)
        floordiv(a, b) -- Same as a // b.

    ge(...)
        ge(a, b) -- Same as a>=b.

    getitem(...)
        getitem(a, b) -- Same as a[b].

    getslice(...)
        getslice(a, b, c) -- Same as a[b:c].

    gt(...)
        gt(a, b) -- Same as a>b.

    iadd(...)
        iadd(a, b) -- Same as a += b.

    iand(...)
        iand(a, b) -- Same as a &= b.

    iconcat(...)
        iconcat(a, b) -- Same as a += b, for a and b sequences.

    idiv(...)
        idiv(a, b) -- Same as a /= b when __future__.division is not in effect.

    ifloordiv(...)
        ifloordiv(a, b) -- Same as a //= b.

    ilshift(...)
        ilshift(a, b) -- Same as a <<= b.

    imod(...)
        imod(a, b) -- Same as a %= b.

    imul(...)
        imul(a, b) -- Same as a *= b.
    index(...)
        index(a) -- Same as a.__index__()

    indexOf(...)
        indexOf(a, b) -- Return the first index of b in a.

    inv(...)
        inv(a) -- Same as ~a.

    invert(...)
        invert(a) -- Same as ~a.

    ior(...)
        ior(a, b) -- Same as a |= b.

    ipow(...)
        ipow(a, b) -- Same as a **= b.

    irepeat(...)
        irepeat(a, b) -- Same as a *= b, where a is a sequence, and b is an integer.

    irshift(...)
        irshift(a, b) -- Same as a >>= b.

    isCallable(...)
        isCallable(a) -- Same as callable(a).

    isMappingType(...)
        isMappingType(a) -- Return True if a has a mapping type, False otherwise.

    isNumberType(...)
        isNumberType(a) -- Return True if a has a numeric type, False otherwise.

    isSequenceType(...)
        isSequenceType(a) -- Return True if a has a sequence type, False otherwise.

    is_(...)
        is_(a, b) -- Same as a is b.
    is_not(...)
        is_not(a, b) -- Same as a is not b.

    isub(...)
        isub(a, b) -- Same as a -= b.

    itruediv(...)
        itruediv(a, b) -- Same as a /= b when __future__.division is in effect.

    ixor(...)
        ixor(a, b) -- Same as a ^= b.

    le(...)
        le(a, b) -- Same as a<=b.

    lshift(...)
        lshift(a, b) -- Same as a << b.

    lt(...)
        lt(a, b) -- Same as a<b.

    mod(...)
        mod(a, b) -- Same as a % b.

    mul(...)
        mul(a, b) -- Same as a * b.

    ne(...)
        ne(a, b) -- Same as a!=b.

    neg(...)
        neg(a) -- Same as -a.

    not_(...)
        not_(a) -- Same as not a.

    or_(...)
        or_(a, b) -- Same as a | b.
    pos(...)
        pos(a) -- Same as +a.

    pow(...)
        pow(a, b) -- Same as a ** b.

    repeat(...)
        repeat(a, b) -- Return a * b, where a is a sequence, and b is an integer.

    rshift(...)
        rshift(a, b) -- Same as a >> b.

    sequenceIncludes(...)
        sequenceIncludes(a, b) -- Same as b in a (note reversed operands; deprecated).

    setitem(...)
        setitem(a, b, c) -- Same as a[b] = c.

    setslice(...)
        setslice(a, b, c, d) -- Same as a[b:c] = d.

    sub(...)
        sub(a, b) -- Same as a - b.

    truediv(...)
        truediv(a, b) -- Same as a / b when __future__.division is in effect.

    truth(...)
        truth(a) -- Return True if a is true, False otherwise.

    xor(...)
        xor(a, b) -- Same as a ^ b.