Python 讀取檔案,list.index(元素)回傳該元素位於那一個index, with open(fpath, ‘r’) as f: while True: aline=f.readline() ; if aline == “”: break ; raw = aline.strip().split(“,”)

fpath=r”C:\Python\WR75\Y Cut\Xpol.txt”

“””

#csv是逗點分隔檔

內容如下:

100.000,10000,11000,12000
-30.000,-70.765,-77.594,-76.722
-29.500,-71.492,-78.381,-76.414

“””

raw_list=[]
with open(fpath, ‘r’) as f:
while True:
aline=f.readline()
print(aline)
if aline == “”: break
raw = aline.strip().split(“,”)

#raw是1D list
raw = [eval(i) for i in raw]
#總是需要印出來,才發現忘記eval()
raw_list.append(raw)

#raw_list是一個2D list

print(“raw:”,raw)

print(“raw_list”,raw_list)
print(type(raw_list))

 

fpath=r”C:\Python\WR75\Y Cut\Xpol.txt”

raw_list=[]
with open(fpath, ‘r’) as f:
while True:
aline=f.readline()
print(aline)
if aline == “”: break
raw = aline.strip().split(“,”)
raw = [eval(i) for i in raw]
#總是需要印出來,才發現忘記eval()
raw_list.append(raw)

print(“raw:”,raw)

print(“raw_list”,raw_list)
print(type(raw_list))

magind=100
angind=10000

MagIdx = raw_list[0].index(magind)
Idx = raw_list[0].index(angind)

print(MagIdx)
print(Idx)

raw_list[0]

[100.0, 10000, 11000, 12000]

因為檔案是縮小版

沒有0

原始檔案:

100~10000~15000~0~10000~15000

100, 0底下的資料都是角度,非強度

magind=100
angind=10000

MagIdx = raw_list[0].index(magind)

#100這個元素,index=0
Idx = raw_list[0].index(angind) 

#10000這個元素,index=1

raw_list[0]

[100.0, 10000, 11000, 12000]