如何从文本中提取一行作为函数的输入 python
how to take a line from a text to use as input for a function python
大家好,我有一个填充了一些地理数据的文本,如下所示:
[(-76.34666,40.006886),(-76.34666,40.073017),(-76.25411,40.073017),(76.25411,40.006886)]
[(-84.82031,38.403187)),(-84.82031,42.327133),(-80.51862,42.327133),(-80.51862,38.403187)]
现在我想将它逐行作为多边形函数的输入。在我尝试迭代之前,我首先尝试用一行来制作它,但它不会工作。这是我现在的代码:
from shapely.wkt import loads as load_wkt
from shapely.geometry import Point, Polygon
f = open('koordinat.txt', 'r')
line = f.readline()
p = Polygon(line)
print (p.centroid)
"p = Polygon(line)" 和
"A LinearRing must have at least 3 coordinate tuples" 但是当把其中一行放在功能手册中时,它工作正常。
有什么帮助吗?还有一个可能的迭代的例子会很好:)
您正在向 Polygon
传递一个字符串,但它需要一个坐标(数字)列表。
试试这个:
import ast
line = ast.literal_eval(f.readline())
大家好,我有一个填充了一些地理数据的文本,如下所示:
[(-76.34666,40.006886),(-76.34666,40.073017),(-76.25411,40.073017),(76.25411,40.006886)] [(-84.82031,38.403187)),(-84.82031,42.327133),(-80.51862,42.327133),(-80.51862,38.403187)]
现在我想将它逐行作为多边形函数的输入。在我尝试迭代之前,我首先尝试用一行来制作它,但它不会工作。这是我现在的代码:
from shapely.wkt import loads as load_wkt
from shapely.geometry import Point, Polygon
f = open('koordinat.txt', 'r')
line = f.readline()
p = Polygon(line)
print (p.centroid)
"p = Polygon(line)" 和 "A LinearRing must have at least 3 coordinate tuples" 但是当把其中一行放在功能手册中时,它工作正常。
有什么帮助吗?还有一个可能的迭代的例子会很好:)
您正在向 Polygon
传递一个字符串,但它需要一个坐标(数字)列表。
试试这个:
import ast
line = ast.literal_eval(f.readline())