Question

我的代码工作正常，但我希望它将值写入文本文件。当我尝试这样做时，我得到'语法无效'。当我使用python shell时，它可以工作。所以我不明白为什么它不能在我的脚本中工作。

我打赌这是愚蠢的，但为什么不把数据输出到文本文件？

#!/usr/bin/env python

#standard module, needed as we deal with command line args
import sys

from fractions import Fraction
import pyexiv2


#checking whether we got enough args, if not, tell how to use, and exits
#if len(sys.argv) != 2 :
#    print "incorrect argument, usage: " + sys.argv[0] + ' <filename>'
#    sys.exit(1)

#so the argument seems to be ok, we use it as an imagefile 
imagefilename = sys.argv[1]



#trying to catch the exceptions in case of problem with the file reading
try:
    metadata = pyexiv2.metadata.ImageMetadata(imagefilename)
    metadata.read();

#trying to catch the exceptions in case of problem with the GPS data reading
    try:
        latitude = metadata.__getitem__("Exif.GPSInfo.GPSLatitude")
        latitudeRef = metadata.__getitem__("Exif.GPSInfo.GPSLatitudeRef")
        longitude = metadata.__getitem__("Exif.GPSInfo.GPSLongitude")
        longitudeRef = metadata.__getitem__("Exif.GPSInfo.GPSLongitudeRef")

        # get the value of the tag, and make it float number
        alt = float(metadata.__getitem__("Exif.GPSInfo.GPSAltitude").value)


        # get human readable values
        latitude = str(latitude).split("=")[1][1:-1].split(" ");
        latitude = map(lambda f: str(float(Fraction(f))), latitude)
        latitude = latitude[0] + u"\u00b0" + latitude[1] + "'" + latitude[2] + '"' + " " + str(latitudeRef).split("=")[1][1:-1]

        longitude = str(longitude).split("=")[1][1:-1].split(" ");
        longitude = map(lambda f: str(float(Fraction(f))), longitude)
        longitude = longitude[0] + u"\u00b0" + longitude[1] + "'" + longitude[2] + '"' + " " + str(longitudeRef).split("=")[1][1:-1]

        ## Printing out, might need to be modified if other format needed
        ## i just simple put tabs here to make nice columns
    print " \n A text file has been created with the following information \n"
    print "GPS EXIF data for " + imagefilename    
        print "Latitude:\t" + latitude 
        print "Longitude:\t" + longitude
        print "Altitude:\t" + str(alt) + " m"
    except Exception, e:  # complain if the GPS reading went wrong, and print the exception
        print "Missing GPS info for " + imagefilename
        print e

# Create a new file or **overwrite an existing file**
text_file = open('textfile.txt', 'w')
text_file.write("Latitude" + latitude)
# Close the output file
text_file.close()


except Exception, e:   # complain if the GPS reading went wrong, and print the exception
    print "Error processing image " + imagefilename
    print e;

我看到的错误是：

text_file = open('textfile.txt','w')
        ^
SyntaxError: invalid syntax

Answer 1

你可以列表错误吗？......行：

print " \n A text file has been created with the following information \n"
print "GPS EXIF data for " + imagefilename

似乎是错误的表格

编辑：您发布的代码 - 其中一条跟踪 - 也是错误的表格。

Answer 2

文件打开位于第一个try块内。除了阻止之外，它在第二次尝试之外。将它移到第一次尝试除了块之外或增加缩进以将它们包括在第一个try块中。它应该在那里工作正常。

同样移动（增加缩进）try中的两个print语句。

这对你有用：

#!/usr/bin/env python

#standard module, needed as we deal with command line args
import sys

from fractions import Fraction
import pyexiv2


#checking whether we got enough args, if not, tell how to use, and exits
#if len(sys.argv) != 2 :
#    print "incorrect argument, usage: " + sys.argv[0] + ' <filename>'
#    sys.exit(1)

#so the argument seems to be ok, we use it as an imagefile 
imagefilename = sys.argv[1]



#trying to catch the exceptions in case of problem with the file reading
try:
    metadata = pyexiv2.metadata.ImageMetadata(imagefilename)
    metadata.read();

#trying to catch the exceptions in case of problem with the GPS data reading
    try:
        latitude = metadata.__getitem__("Exif.GPSInfo.GPSLatitude")
        latitudeRef = metadata.__getitem__("Exif.GPSInfo.GPSLatitudeRef")
        longitude = metadata.__getitem__("Exif.GPSInfo.GPSLongitude")
        longitudeRef = metadata.__getitem__("Exif.GPSInfo.GPSLongitudeRef")

        # get the value of the tag, and make it float number
        alt = float(metadata.__getitem__("Exif.GPSInfo.GPSAltitude").value)


        # get human readable values
        latitude = str(latitude).split("=")[1][1:-1].split(" ");
        latitude = map(lambda f: str(float(Fraction(f))), latitude)
        latitude = latitude[0] + u"\u00b0" + latitude[1] + "'" + latitude[2] + '"' + " " + str(latitudeRef).split("=")[1][1:-1]

        longitude = str(longitude).split("=")[1][1:-1].split(" ");
        longitude = map(lambda f: str(float(Fraction(f))), longitude)
        longitude = longitude[0] + u"\u00b0" + longitude[1] + "'" + longitude[2] + '"' + " " + str(longitudeRef).split("=")[1][1:-1]

        ## Printing out, might need to be modified if other format needed
        ## i just simple put tabs here to make nice columns
        print " \n A text file has been created with the following information \n"
        print "GPS EXIF data for " + imagefilename    
        print "Latitude:\t" + latitude 
        print "Longitude:\t" + longitude
        print "Altitude:\t" + str(alt) + " m"
    except Exception, e:  # complain if the GPS reading went wrong, and print the exception
        print "Missing GPS info for " + imagefilename
        print e

    # Create a new file or **overwrite an existing file**
    text_file = open('textfile.txt', 'w')
    text_file.write("Latitude" + latitude)
    # Close the output file
    text_file.close()


except Exception, e:   # complain if the GPS reading went wrong, and print the exception
    print "Error processing image " + imagefilename
    print e;

无法写入文本文件python 2.7无效的语法？

2 个答案: