The*_*tor 0 python for-loop function list append
我有一个功能:
def function(x,y):
do something
print a,b
return a,b
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现在我使用 for 循环,例如:
for i in range(10,100,10):
function(i,30)
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a,b它通过 for 循环打印给定输入值的值。a,b如果我说,它也会返回,function(10,30)例如:
Out[50]: (0.25725063633960099, 0.0039189363571677958)
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我想将通过 for 循环a,b为不同输入参数获得的值附加到两个空列表。(x,y)
我试过
for i in range(10,100,10):
list_a,list_b = function(i,30)
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但list_a和list_b仍然是空的。
编辑:
我也尝试过:
list_a = []
list_b = []
for i in range(10,100,10):
list_a.append(function(i,30)[0])
list_b.append(function(i,30)[1])
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但list_a和list_b都是空的!
我不明白的是,当我打电话时
function(10,30)[0]
例如,它输出一个值!但为什么我无法将其附加到列表中?
这是一些人询问的完整功能。
def function(N,bins):
sample = np.log10(m200_1[n200_1>N]) # can be any 1D array
mean,scatter = stats.norm.fit(sample) #Gives the paramters of the fit to the histogram
err_std = scatter/np.sqrt(len(sample))
if N<30:
x_fit = np.linspace(sample.min(),sample.max(),100)
pdf_fitted = stats.norm.pdf(x_fit,loc=mean,scale=scatter) #Gives the PDF, given the parameters from norm.fit
print "scatter for N>%s is %s" %(N,scatter)
print "error on scatter for N>%s is %s" %(N,err_std)
print "mean for N>%s is %s" %(N,mean)
else:
x_fit = np.linspace(sample.min(),sample.max(),100)
pdf_fitted = stats.norm.pdf(x_fit,loc=mean,scale=scatter) #Gives the PDF, given the parameters from norm.fit
print "scatter for N>%s is %s" %(N,scatter)
print "error on scatter for N>%s is %s" %(N,err_std)
print "mean for N>%s is %s" %(N,mean)
return scatter,err_std
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你可以先使用列表理解,通过zip获取list_a,list_b。
def function(x,y):
return x,y
result = [function(i,30) for i in range(10,100,10)]
list_a, list_b = zip(*result)
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