Python stdin.read函数代码示例

def readpipe() -> str:
    """Read from a pipe"""
    while True:
        _input = ''
        _data = stdin.read(1)
        while _data:
            _input += _data
            _data = stdin.read(1)
        return str(_input)

def readpipe() -> str:
    """Read from pipe"""
    while True:
        _input = ''
        _character = stdin.read(1)
        while _character:
            _input += _character
            _character = stdin.read(1)
        return str(_input)

	def read(self):
		self.alive = True
		self.writer_thread.start()		
		ch = stdin.read(1)
		while ch != '#':
			self.sp.write(ch)
			ch = stdin.read(1)
		self.alive = False
		self.sp.write(' ')
		self.writer_thread.join()

    def alter(self, message, arguments):
        """
        Performs operations specified in the arguments to modify the message in
        whatever way.
        """

        message = message.copy()

        # Entity

        if arguments.entity:
            message["entity"] = arguments.entity
        if arguments.readEntity:
            message["entity"] = open(arguments.readEntity, "r").read()
        if arguments.entityStdin:
            message["entity"] = stdin.read()
        if arguments.appendEntity:
            message["entity"] += arguments.appendEntity
        if arguments.appendEntityStdin:
            message["entity"] += stdin.read()
        if arguments.appendEntityFile:
            message["entity"] += open(arguments.appendEntityFile, "r").read()

        # Top-line

        if arguments.version:
            message["version"] = arguments.version
        if arguments.method:
            message["method"] = arguments.method.upper()
        if arguments.path:
            message["path"] = arguments.path
        if arguments.status:
            message["status"] = arguments.status
        if arguments.reason:
            message["reason"] = arguments.reason.upper()

        # Headers

        for header in arguments.header:
            message["headers"] = setValuesByName(message["headers"], *header)
        if arguments.host:
            message["headers"] = setValuesByName(message["headers"], "Host", arguments.host)
        if arguments.auto: # obviously must come after entity
            message["headers"] = setValuesByName(
                message["headers"],
                "Content-length",
                str(len(message["entity"]))
        )

        return message 

	def getch():
		stdout.flush()
		fd=stdin.fileno()
		if isatty(fd):
			oldset=tcgetattr(fd)
			newset=oldset[:]
			try:
				newset[3]&=-11
				tcsetattr(fd, TCSANOW, newset)
				return ord(stdin.read(1))
			finally:tcsetattr(fd, TCSANOW, oldset)
		else:
			fd=stdin.read(1)
			return ord(fd) if fd else -1

    def _windows_shell(self, chan):
        import threading

        stdout.write("Line-buffered terminal emulation. Press F6 or ^Z to send EOF.\r\n\r\n")

        def writeall(sock):
            while True:
                data = sock.recv(256)
                if not data:
                    stdout.write("\r\n*** EOF ***\r\n\r\n")
                    stdout.flush()
                    break
                stdout.write(data)
                stdout.flush()

        writer = threading.Thread(target=writeall, args=(chan,))
        writer.start()

        try:
            while True:
                d = stdin.read(1)
                if not d:
                    break
                chan.send(d)
        except EOFError:
            # user hit ^Z or F6
            pass

def main():
    answers = ans

    def ansans(n):
        return answers[n - 1]

    print '\n'.join(map(ansans, map(int, stdin.read().split())))

def write_command(server, command):
    # write the command
    server.stdin.write('runcommand\n')
    writeblock(server, command)

    # receive the response
    while True:
        channel, val = readchannel(server)
        if channel == 'o':
            print val.rstrip()
        elif channel == 'e':
            print 'error: %s' % val.rstrip()
        elif channel == 'r':
            r = unpack(">l", val)[0]
            if r is not 0:
                print 'ERROR %s' % r
            break
        elif channel == 'L':
            print '(line read request)'
            writeblock(server, stdin.readline(val))
        elif channel == 'I':
            print '(block read request)'
            writeblock(server, stdin.read(val))
        else:
            print 'unexpected channel: %s %s' % (channel, val)
            if channel.isupper():  # required?
                break

def main():
    dstream = imap(float, stdin.read().split())
    try:
        for a, b, s, m, n in izip(dstream, dstream, dstream, dstream, dstream):
            print "%.2f %.2f" % (degrees(atan2(n*b, m*a)), sqrt((m*a / s)**2 + (n*b / s)**2))
    except ZeroDivisionError:
        pass

def main():
    fpp = [
        0, 3, 5, 11, 17, 2, 2, 5, 11, 19, 23, 23, 197, 307, 359, 521, 1553,
        2693, 3083, 419, 953, 5, 11, 13, 5, 7, 53, 107, 131, 103, 359, 419, 223,
        613, 541, 691, 151, 593, 1069, 1321, 1193, 3083, 311, 1619, 1543, 4813,
        5519, 23, 61, 151, 307, 359, 23, 197, 593, 827, 2789, 5443, 9311, 1427,
        1427, 5039, 13249, 4813, 13697, 6857, 19447, 4211, 4211, 38197, 12197,
        521, 1553, 1931, 853, 3083, 2693, 11353, 3083, 6857, 23789, 6007, 53881,
        60761, 51713, 111599, 72871, 100169, 244691, 134587, 248851, 288359,
        127081, 272141, 424243, 4127, 419, 5519, 12197, 49681, 10627, 36677,
        79349, 109037, 124181, 202987, 57559, 124181, 229727, 127081, 222863,
        373019, 170627, 364523]
    pp = [
        0, 2, 3, 5, 7, 11, 101, 131, 151, 181, 191,
        313, 353, 373, 383, 727, 757, 787, 797, 919, 929, 10301, 10501, 10601, 11311,
        11411, 12421, 12721, 12821, 13331, 13831, 13931, 14341, 14741, 15451, 15551,
        16061, 16361, 16561, 16661, 17471, 17971, 18181, 18481, 19391, 19891, 19991,
        30103, 30203, 30403, 30703, 30803, 31013, 31513, 32323, 32423, 33533, 34543,
        34843, 35053, 35153, 35353, 35753, 36263, 36563, 37273, 37573, 38083, 38183,
        38783, 39293, 70207, 70507, 70607, 71317, 71917, 72227, 72727, 73037, 73237,
        73637, 74047, 74747, 75557, 76367, 76667, 77377, 77477, 77977, 78487, 78787,
        78887, 79397, 79697, 79997, 90709, 91019, 93139, 93239, 93739, 94049, 94349,
        94649, 94849, 94949, 95959, 96269, 96469, 96769, 97379, 97579, 97879, 98389,
        98689]
    print '\n'.join(["%s %s" % (pp[n], fpp[n]) for n in map(int, stdin.read().split()[1:])])

def main():
    nextint = iter(map(int, stdin.read().split())).next
    # next = iter(stdin.read().split()).next
    nk, q = nextint(), nextint()
    temp = 0
    Qu = [(nextint(), nextint() + 1, nextint()) for _ in xrange(q)]
    ends = []
    temps = {}
    for k, it in groupby(sorted(Qu), key=itemgetter(0)):
        while ends and ends[0][0] <= k:
            e = heappop(ends)
            temp -= e[1]
            temps[e[0]] = temp
        for _, y, i in it:
            temp += i
            heappush(ends, (y, i))
        temps[k] = temp
    while ends:
        e = heappop(ends)
        temp -= e[1]
        temps[e[0]] = temp
    assert temp == 0
    tot = 0
    xxx = sorted(temps.items())
    for (x1, y1), (x2, y2) in zip(xxx, xxx[1:]):
        if y1 >= nk:
            tot += x2 - x1
    print tot

def main():
    out = bytearray()
    try:
        dstream = imap(int, stdin.read().split())
        for _ in xrange(1000000000):
            n = next(dstream)
            arr = [(0, next(dstream)) for _ in xrange(n)]
            dp = [[(float('inf'), float('inf'))]*x for x in xrange(1, len(arr))]
            dp.append(arr)
            for x in xrange(n - 2, -1, -1):
                for y in xrange(x + 1):
                    lo, hi = y, y + n - x
                    for lhi in xrange(lo + 1, hi):
                        dp[n - (hi - lo)][lo] = min(
                            dp[n - (hi - lo)][lo],

                            (
                                dp[n - (lhi - lo)][lo][0] +
                                dp[n - (hi - lhi)][lhi][0] +
                                (
                                    dp[n - (lhi - lo)][lo][1] *
                                    dp[n - (hi - lhi)][lhi][1]),

                                (
                                    dp[n - (lhi - lo)][lo][1] +
                                    dp[n - (hi - lhi)][lhi][1]) % 100
                            )
                        )
            out.extend(bytes(dp[0][0][0]))
            out.append('\n')
    except StopIteration:
        print out

def main():
    nextint = map(int, stdin.read().split()).__next__
    n, m = nextint(), nextint()
    graph = [defaultdict(int) for _ in range(n)]
    for _ in range(m):
        graph[nextint() - 1][nextint() - 1] += 1
    print(" ".join(map(str, topological_sort(graph))))

def main():
    fibs = [
        1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584,
        4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811,
        514229, 832040, 1346269, 2178309, 3524578, 5702887, 9227465, 14930352,
        24157817, 39088169, 63245986, 102334155, 165580141, 267914296, 433494437,
        701408733, 1134903170, 1836311903, 2971215073, 4807526976, 7778742049,
        12586269025, 20365011074, 32951280099, 53316291173, 86267571272,
        139583862445, 225851433717, 365435296162, 591286729879, 956722026041,
        1548008755920, 2504730781961, 4052739537881, 6557470319842, 10610209857723,
        17167680177565, 27777890035288, 44945570212853, 72723460248141, 117669030460994,
        190392490709135, 308061521170129, 498454011879264, 806515533049393, 1304969544928657]

    def nbin(n):
        if n == 0:
            return '0'
        num = bytearray()
        for x in xrange(bisect(fibs, n - 1), -1, -1):
            if fibs[x] <= n:
                num.append('1')
                n -= fibs[x]
            else:
                num.append('0')
        return str(num).lstrip('0')

    dstream = map(int, stdin.read().split())
    print '\n'.join([nbin(dstream[x]) for x in xrange(1, dstream[0] + 1)])

def main():
    def extended_gcd(aa, bb):
        lastr, remainder = abs(aa), abs(bb)
        x, lastx, y, lasty = 0, 1, 1, 0
        while remainder:
            lastr, (quotient, remainder) = remainder, divmod(lastr, remainder)
            x, lastx = lastx - quotient * x, x
            y, lasty = lasty - quotient * y, y
        return lastr, lastx * (-1 if aa < 0 else 1), lasty * (-1 if bb < 0 else 1)

    def modinv(a, m):
        g, x, _ = extended_gcd(a, m)
        if g != 1:
            raise ValueError
        return x % m

    dstream = map(int, stdin.read().split())
    dstream.pop()
    dstream.pop()
    dstream = iter(dstream)
    out = []
    m = 1000000007
    for n, l in zip(dstream, dstream):
        out.append(str((n*(pow(n, l, m) - 1)*modinv(n - 1, m)) % m))
    print '\n'.join(out)