我的代码中的全局变量有问题。在 SCRIPT1.py 我使用了一个小文档 config.py 中的许多变量，这些变量只包含我在代码的其他模块中也需要的变量。但是在运行我的 SCRIPT1.py 时，我收到一个错误（错误）。我不知道为什么它不适用于配置。（变量名称）...我发现这个解决方案可以让您的所有模块中的变量在堆栈溢出时获得很多好评。我做错了什么？
首先，我的代码包含config.costSurfaceA而不是costSurfaceArray（例如'def createPath'），但是当使用此变量运行时，由于"config.costSurfaceA"中的点，它给了我一个语法错误。我用"costSurfaceArray"替换了它，并在if语句"config.costSurfaceA = costSurfaceArray"中执行此操作，只是为了将其作为变量。但我有一种感觉，这一切都是白费的。
谢谢你对我的帮助！我知道这是很多代码，但我认为这对理解很重要。
SCRIPT1.py
from osgeo import gdal, osr
from skimage.graph import route_through_array
import numpy as np
import Save_Array_To_Excel_01
import config
def ask_costsurfacepath_path():
config.costsurfacepath = input('please enter the system path where to find the cost-surface-IMG file (ex: /Users/PeterVanvoorden/Documents/GroepT/Thesis/Branched_Testfile.img): ')
def ask_outputpath_path():
config.outputpath = input('please enter the system path where to save the outputpath IMG file (ex: /Users/PeterVanvoorden/Documents/GroepT/Thesis/Branched_Testfile.img): ')
def raster2array(rasterfn):
print 'raster2array'
raster = gdal.Open(rasterfn)
band = raster.GetRasterBand(1)
array = band.ReadAsArray()
return array
def coord2pixelOffset(rasterfn,x,y):
print 'coord2pixelOffset'
raster = gdal.Open(rasterfn)
geotransform = raster.GetGeoTransform()
originX = geotransform[0] # East/West location of Upper Left corner
originY = geotransform[3] # North/South location of Upper Left corner
pixelWidth = geotransform[1] # X pixel size
pixelHeight = geotransform[5] # Y pixel size
xOffset = int((x - originX)/pixelWidth)
yOffset = int((y - originY)/pixelHeight)
return xOffset,yOffset
def createPath(CostSurfacefn,costSurfaceArray,startCoord,stopCoord):
print 'creatpath'
# coordinates to array index
startCoordX = startCoord[0]
startCoordY = startCoord[1]
startIndexX,startIndexY = coord2pixelOffset(CostSurfacefn,startCoordX,startCoordY)
stopCoordX = stopCoord[0]
stopCoordY = stopCoord[1]
stopIndexX,stopIndexY = coord2pixelOffset(CostSurfacefn,stopCoordX,stopCoordY)
# create path
indices, weight = route_through_array(costSurfaceArray, (startIndexY,startIndexX), (stopIndexY,stopIndexX),geometric=True,fully_connected=True)
indices = np.array(indices).T
path = np.zeros_like(costSurfaceArray)
path[indices[0], indices[1]] = 1
return path
def array2raster(newRasterfn,rasterfn,array):
print 'array2raster'
raster = gdal.Open(rasterfn)
geotransform = raster.GetGeoTransform()
originX = geotransform[0] # East/West location of Upper Left corner
originY = geotransform[3] # North/South location of Upper Left corner
pixelWidth = geotransform[1] # X pixel size
pixelHeight = geotransform[5] # Y pixel size
cols = array.shape[1]
rows = array.shape[0]
driver = gdal.GetDriverByName('GTiff')
outRaster = driver.Create(newRasterfn, cols, rows, gdal.GDT_Byte)
outRaster.SetGeoTransform((originX, pixelWidth, 0, originY, 0, pixelHeight))
outband = outRaster.GetRasterBand(1)
outband.WriteArray(array)
outRasterSRS = osr.SpatialReference()
outRasterSRS.ImportFromWkt(raster.GetProjectionRef())
outRaster.SetProjection(outRasterSRS.ExportToWkt())
outband.FlushCache()
def main(CostSurfacefn,outputPathfn,startCoord,stopCoord):
print 'main'
costSurfaceArray = raster2array(CostSurfacefn) # creates array from cost surface raster
config.costSurfaceA = costSurfaceArray
config.pathArray = createPath(CostSurfacefn,costSurfaceArray,startCoord,stopCoord) # creates path array
Save_Array_To_Excel_01.Save_Array(config.pathArray) # Save Array to csv file
array2raster(outputPathfn,CostSurfacefn,config.pathArray) # converts path array to raster
if __name__ == "__main__":
ask_costsurfacepath_path()
ask_outputpath_path()
CostSurfacefn = config.costsurfacepath
print config.costsurfacepath
startCoord = (config.startX,config.startY)
stopCoord = (config.stopX,config.stopY)
outputPathfn = config.outputpath
main(CostSurfacefn,outputPathfn,startCoord,stopCoord)
config.py
# Configuration file with all global variables
# number of properties
number = None
# different permutations of properties
permutations = list()
# properties array containing:
# * first column = ID first property [0]
# * second column = ID second property [1]
# * third column = distance between two properties [2]
# * forth column = estimated cost [3]
properties_array = None
# lowest price until now
lowest_price = 10**10000
# path with this lowest price
lowest_path = None
# current price (needs to be compared with lowest price)
current_price = 0
# current path (needs to be compared with lowest path)
current_path = [1]
# path to place where to save properties list
plist_path = None
# Array of the path
pathArray = None
# Array of the map
costSurfaceA = None
# current start X coordinate
startX = 0
# current start Y coordinate
startY = 0
# current stop X coordinate
stopX = 0
# current stop Y coordinate
stopY = 0
# path to costsurface IMG file
costsurfacepath = 0
# path to output path from Least cost path analysis
outputpath = 0
错误
please enter the system path where to put the file as a STRING (ex: /Users/PeterVanvoorden/Documents/GroepT/Thesis/Branched_Testfile.csv): '/User/PeterVanvoorden/Desktop/Shell.csv'
You entered: /User/PeterVanvoorden/Desktop/Shell.csv
please enter the system path where to find the cost-surface-IMG file (ex: /Users/PeterVanvoorden/Documents/GroepT/Thesis/Branched_Testfile.img): '/User/PeterVanvoorden/Desktop/clipsmall.img'
please enter the system path where to save the outputpath IMG file (ex: /Users/PeterVanvoorden/Documents/GroepT/Thesis/Branched_Testfile.img): '/User/PeterVanvoorden/Desktop/Shellimg.img'
/User/PeterVanvoorden/Desktop/clipsmall.img
main
raster2array
Traceback (most recent call last):
File "/Users/PeterVanvoorden/Documents/GroepT/Thesis/f_python_standalone/python_files/Working_Files/Least_cost_path_analysis_01_outputArray.py", line 97, in <module>
main(CostSurfacefn,outputPathfn,startCoord,stopCoord)
File "/Users/PeterVanvoorden/Documents/GroepT/Thesis/f_python_standalone/python_files/Working_Files/Least_cost_path_analysis_01_outputArray.py", line 76, in main
costSurfaceArray = raster2array(CostSurfacefn) # creates array from cost surface raster
File "/Users/PeterVanvoorden/Documents/GroepT/Thesis/f_python_standalone/python_files/Working_Files/Least_cost_path_analysis_01_outputArray.py", line 17, in raster2array
band = raster.GetRasterBand(1)
AttributeError: 'NoneType' object has no attribute 'GetRasterBand'
你可以这样传来传去。
def ask_costsurfacepath_path():
costsurfacepath = input('please enter ...')
return costsurfacepath
... in __name__ == '__main__'
CostSurfacefn = ask_costsurfacepath_path()
...