将一组坐标从字符串转换为整数

Question

如何将我的 siteData（坐标列表）从字符串转换为 int？

print(siteData)
    cat|x|y|z
    1|343741.396330097|1029255.04807763|0
    2|342270.660062496|1030198.57861216|0
    3|339743.874252208|1030705.47801259|0
    4|343031.709457817|1027263.37839108|0
    5|339453.578589758|1029954.65896125|0
    6|341376.669330771|1029549.5339487|0
    7|339224.904513178|1030438.74647616|0
    8|340285.317292692|1029431.45860403|0
    9|343135.800101739|1029804.27059289|0
    10|338982.428513304|1028857.42081259|0
    11|338405.612076696|1034287.30455498|0
    12|338080.457138754|1034337.35427931|0
    13|338944.90541069|1034519.90737124|0
    14|340963.209546547|1032528.77710582|0
    15|337891.948788692|1030626.74686363|0

Answer 1

根据 Hozayfa 的评论，您可以按如下方式执行此操作：

lineWise = [line.strip() for line in siteData.split('\n')][1:]
# This creates a list containing each row of siteData as a separate item and skips the header
for row in lineWise:
    data = row.split('|')
    cat = int(data[0])
    x = int(float(data[1]))
    y = int(float(data[2]))
    z = int(float(data[3]))

您可以在循环内使用变量 cat, x, y 和 z；它们将是 int.

类型

编辑：这是假设 siteData 完全像这样：

cat|x|y|z
1|343741.396330097|1029255.04807763|0
2|342270.660062496|1030198.57861216|0
3|339743.874252208|1030705.47801259|0
4|343031.709457817|1027263.37839108|0
5|339453.578589758|1029954.65896125|0
6|341376.669330771|1029549.5339487|0
7|339224.904513178|1030438.74647616|0
8|340285.317292692|1029431.45860403|0
9|343135.800101739|1029804.27059289|0
10|338982.428513304|1028857.42081259|0
11|338405.612076696|1034287.30455498|0
12|338080.457138754|1034337.35427931|0
13|338944.90541069|1034519.90737124|0
14|340963.209546547|1032528.77710582|0
15|337891.948788692|1030626.74686363|0

Answer 2

我认为 csv 模块更适合解析此类数据：

import csv
siteData = """
    cat|x|y|z
    1|343741.396330097|1029255.04807763|0
    2|342270.660062496|1030198.57861216|0
    3|339743.874252208|1030705.47801259|0
    4|343031.709457817|1027263.37839108|0
    5|339453.578589758|1029954.65896125|0
    6|341376.669330771|1029549.5339487|0
    7|339224.904513178|1030438.74647616|0
    8|340285.317292692|1029431.45860403|0
    9|343135.800101739|1029804.27059289|0
    10|338982.428513304|1028857.42081259|0
    11|338405.612076696|1034287.30455498|0
    12|338080.457138754|1034337.35427931|0
    13|338944.90541069|1034519.90737124|0
    14|340963.209546547|1032528.77710582|0
    15|337891.948788692|1030626.74686363|0
"""
points = []
reader = csv.DictReader(siteData.strip().splitlines(), delimiter="|", quotechar='"')
for row in reader:
    point = {
        "id": int(row["cat"]), 
        "x": float(row["x"]),
        "y": float(row["y"]),
        "z": float(row["z"])
    }
    points.append(point)

for point in points:
    print(point)

输出：

{'id': 1, 'x': 343741.396330097, 'y': 1029255.04807763, 'z': 0.0}
{'id': 2, 'x': 342270.660062496, 'y': 1030198.57861216, 'z': 0.0}
{'id': 3, 'x': 339743.874252208, 'y': 1030705.47801259, 'z': 0.0}
{'id': 4, 'x': 343031.709457817, 'y': 1027263.37839108, 'z': 0.0}
{'id': 5, 'x': 339453.578589758, 'y': 1029954.65896125, 'z': 0.0}
{'id': 6, 'x': 341376.669330771, 'y': 1029549.5339487, 'z': 0.0}
{'id': 7, 'x': 339224.904513178, 'y': 1030438.74647616, 'z': 0.0}
{'id': 8, 'x': 340285.317292692, 'y': 1029431.45860403, 'z': 0.0}
{'id': 9, 'x': 343135.800101739, 'y': 1029804.27059289, 'z': 0.0}
{'id': 10, 'x': 338982.428513304, 'y': 1028857.42081259, 'z': 0.0}
{'id': 11, 'x': 338405.612076696, 'y': 1034287.30455498, 'z': 0.0}
{'id': 12, 'x': 338080.457138754, 'y': 1034337.35427931, 'z': 0.0}
{'id': 13, 'x': 338944.90541069, 'y': 1034519.90737124, 'z': 0.0}
{'id': 14, 'x': 340963.209546547, 'y': 1032528.77710582, 'z': 0.0}
{'id': 15, 'x': 337891.948788692, 'y': 1030626.74686363, 'z': 0.0}

Answer 3

使用Pandas

import pandas as pd
from io import StringIO 

siteData = """cat|x|y|z
    1|343741.396330097|1029255.04807763|0
    2|342270.660062496|1030198.57861216|0
    3|339743.874252208|1030705.47801259|0
    4|343031.709457817|1027263.37839108|0
    5|339453.578589758|1029954.65896125|0
    6|341376.669330771|1029549.5339487|0
    7|339224.904513178|1030438.74647616|0
    8|340285.317292692|1029431.45860403|0
    9|343135.800101739|1029804.27059289|0
    10|338982.428513304|1028857.42081259|0
    11|338405.612076696|1034287.30455498|0
    12|338080.457138754|1034337.35427931|0
    13|338944.90541069|1034519.90737124|0
    14|340963.209546547|1032528.77710582|0
    15|337891.948788692|1030626.74686363|0"""

# wrap the siteData string data in StringIO function
# use pandas read_csv to create DataFrame
df = pd.read_csv(StringIO(siteData), sep ="|", dtype=float).astype(int)
print(df)

输出

    cat       x        y  z
0     1  343741  1029255  0
1     2  342270  1030198  0
2     3  339743  1030705  0
3     4  343031  1027263  0
4     5  339453  1029954  0
5     6  341376  1029549  0
6     7  339224  1030438  0
7     8  340285  1029431  0
8     9  343135  1029804  0
9    10  338982  1028857  0
10   11  338405  1034287  0
11   12  338080  1034337  0
12   13  338944  1034519  0
13   14  340963  1032528  0
14   15  337891  1030626  0

将一组坐标从字符串转换为整数

convert a set of coordinates from string to int

python

gis

python-2.7

grass