Question

确定。把头发拉出来。我整天写这样的代码，不能为我的生活看到为什么这样做。也许我需要睡觉。

我的代码：

    gsamp       = 0     # good samples
    zsamp       = 0     # zero samples
    nsamp       = 0     # null samples
    rtotal      = 0 
    rtotalltms  = 0 
    pctltms     = 0.0 
    peakh       = 0 
    peakl       = 0 

    for sample in self.rawdata:
        if "data" not in sample['data']:
            nsamp += 1
            continue
        if not bool(sample['data']['data']):
            nsamp += 1
            continue
        rtotal += sample['data']['value']
        gsamp += 1
        # If I print gsamp here it shows it being correctly incremented
        for entry in sample['data']['data']:
            if int(entry['key']) <= thresh:
                rtotalltms += entry['value']
            if gsamp == 1:
                print "DEBUG gsamp=%d" % gsamp
                peakh = int(entry['key'])
                peakl = int(entry['key'])
                continue
            if int(entry['key'] > peakh):
                peakh = int(entry['key'])
                continue
            if int(entry['key'] < peakl):
                peakl = int(entry['key'])
                continue

我应该只看到调试行打印一次。但由于某些原因，gsamp是本地范围的东西。

当我使用30个样本的数据集运行此代码时，我看到调试行打印了30次，gsamp = 1。

感谢您的帮助。

Answer 1

问题是，当您循环浏览gsamp时，您在顶部循环中递增sample.rawdata，但是您点击了第二个循环sample['data']['data']。这是打印调试语句的地方。

如果删除其余代码，您可以看到正在进行的操作：

[...]

gsamp += 1
    # If I print gsamp here it shows it being correctly incremented
    for entry in sample['data']['data']:
        if int(entry['key']) <= thresh:
            rtotalltms += entry['value']
        if gsamp == 1:
            print "DEBUG gsamp=%d" % gsamp

            [...]

变量范围问题（我认为）

1 个答案: