将变量的值输出到文本文件

Question

我是python的新手，需要将SPI读取的值输出到文本文件。 我有一个创建文本文件的功能，还有一个可以读取SPI的功能，但是我不确定如何使这两个文件相互交互。 我熟悉OOP中“朋友”的概念，但不熟悉python如何在创建可见性方面如何对待单独的函数。 我需要将SPI函数的返回值传递给create text函数，以便可以对其进行存储。

def timeStamp(fname, fmt = '%Y%m%d--%H%M%S_{fname}'):                       
    return datetime.datetime.now().strftime(fmt).format(fname = fname)

with open (timeStamp('SPI_Inputs'), 'w') as output:     
        output.write('this needs to be adc output')

def readadc(adcnum):
    if adcnum > 7 or adcnum < 0:
        return -1
    r = spi.xfer2([1,8 + adcnum << 4,0])
    adcout = ((r[1] & 3) << 8) + r[2]
    return adcout   #this needs to be put into text file

while True:
    ADC_Val = int(round(readadc(0)/10.24))
    print "Input = ", ADC_Val
    count = count +1
    time.sleep (0.2)

    timeStamp(readadc))

Answer 1

我认为您要执行的操作如下：

def timeStamp(fname, fmt = '%Y%m%d--%H%M%S_{fname}'):                       
    return datetime.datetime.now().strftime(fmt).format(fname = fname)

def write_to_file(str):
    with open (timeStamp('SPI_Inputs'), 'w') as output:     
        output.write(str)

def readadc(adcnum):
    if adcnum > 7 or adcnum < 0:
        return -1
    r = spi.xfer2([1,8 + adcnum << 4,0])
    adcout = ((r[1] & 3) << 8) + r[2]
    return adcout   #this needs to be put into text file

while True:
    ADC_Val = int(round(readadc(0)/10.24))
    write_to_file(ADC_Val)
    print "Input = ", ADC_Val
    time.sleep (0.2)
    print timeStamp(readadc))