使用file.wri的Python语法无效

Question

尝试学习一些地理空间Python。或多或少地遵循类注释here。

My Code

#!/usr/bin/python

# import modules
import ogr, sys, os

# set working dir
os.chdir('/home/jacques/misc/pythongis/data')

# create the text file we're writing to
file = open('data_export.txt', 'w')

# import the required driver for .shp
driver = ogr.GetDriverByName('ESRI Shapefile')

# open the datasource
data = driver.Open('road_surveys.shp', 1)
if data is None:
    print 'Error, could not locate file'
    sys.exit(1)

# grab the datalayer
layer = data.GetLayer()

# loop through the features
feature = layer.GetNextFeature()
while feature:

    # acquire attributes
    id = feature.GetFieldAsString('Site_Id')
    date = feature.GetFieldAsString('Date')

    # get coordinates
    geometry = feature.GetGeometryRef()
    x = str(geometry.GetX())
    y = str(geometry.GetY()

    # write to the file
    file.Write(id + ' ' + x + ' ' + y + ' ' + cover + '\n')

    # remove the current feature, and get a new one
    feature.Destroy()
    feature = layer.GetNextFeature()

# close the data source
datasource.Destroy()
file.close()

跑步给我带来了以下好处：

  File "shape_summary.py", line 38
    file.write(id + ' ' + x + ' ' + y + ' ' + cover + '\n')
       ^
SyntaxError: invalid syntax

运行Python2.7.1

任何帮助都太棒了！

Answer 1

1）在代码中，write不应该是大写（Python是区分大小写的） 2） 确保id是一个字符串；如果在你的术语中没有使用str（id），那么“cover”、“x”和“y”也一样

Answer 2

前一行缺少右括号：

y = str(geometry.GetY())

另外，只需要一个样式注释：最好避免在python中使用变量名file，因为它实际上有意义。尝试打开一个新的python会话并运行help(file)