名称错误：全局名称'variable'未定义 python

Question

我正在做一个项目，这个错误不断出现：

class PRNG:
    def __init__(self):
    # parameters
    # P-256 prime
    self.p=115792089210356248762697446949407573530086143415290314195533631308867097853951
    self.a=self.p-3
    self.b=41058363725152142129326129780047268409114441015993725554835256314039467401291
    self.E=curve(self.a,self.b,self.p)
    self.E.n=115792089210356248762697446949407573529996955224135760342422259061068512044369
    self.P=point(0,46263761741508638697010950048709651021688891777877937875096931459006746039284)
    self.k=183521403747637560534595403690771364941493702673414885451510208165414833985
    self.Q=mult(self.k,self.P,self.E)
    self.t=bytes_to_int(os.urandom(32)) # initial seed
    #print self.t
    self.output_length=240
    self.truncate_length=16
    def function_attack(self, nbytes, predicted_state):
        calls = ((nbytes*8-1)/self.output_length)+1
        out = ''
        for i in xrange(calls):
            tP=mult(predicted_state,self.P,self.E)
            s=tP.x
            sQ=mult(s,self.Q,self.E)
            r=sQ.x
            r_out=r % (2**self.output_length)
            self.t=s
            out = out + int_to_bytes(r_out, self.output_length/8)
        return out[:nbytes]
def function(self, nbytes):
        calls = ((nbytes*8-1)/self.output_length)+1
        out = ''
        for i in xrange(calls):
            tP=mult(self.t,self.P,self.E)
            s=tP.x
            sQ=mult(s,self.Q,self.E)
            r=sQ.x
            r_out=r % (2**self.output_length)
            self.t=s
            out = out + int_to_bytes(r_out, self.output_length/8)
        return out[:nbytes]

第一种方法在单独的文件中调用，输出始终如下（无论我是否更改局部变量调用的名称）：

File "C:file1.py", line 32, in <module>
    prng = PRNG()
  File "C:file_where_error_occurs.py", line 286, in __init__
    for i in xrange(calls):
NameError: global name 'calls' is not defined

python在做什么？

Answer 1

您有缩进错误...这通常是由混合制表符和空格引起的...大多数体面的编辑器都可以轻松为您解决此问题......要查看缩进错误，请运行程序

python -tt my_program.py