python保存数据到文件
对于一个class里面定义的一个list ,list 里面顺序存储一个个set，如下：
定义在class的 def __init__(self):里面的一个list
# current landmark
self.curr_lmks = None
打印一帧数据可以看到里面的数据存储格式：
print(self.curr_lmks)
输出：
[[ 296.80924061 139.72795761] [ 322.215148 140.59542087] [ 347.24859795 143.71130616] [ 372.00324904 147.43723384] [ 394.80113752 155.18902678] [ 414.9305538 168.15372198] [ 431.30218886 184.80147068] [ 443.64536521 203.41504124] [ 447.14027354 225.05291964] [ 443.28832652 246.59363998] [ 430.71797592 264.75206486] [ 414.55095926 281.11598251] [ 394.65242666 294.1897381 ] [ 371.97248677 302.06383523] [ 347.88937108 306.67409222] [ 323.55717526 310.14117345] [ 298.49315548 311.96310889] [ 283.99451966 153.33874098] [ 272.41493546 164.13963954] [ 269.46621966 180.33307878] [ 272.12100384 197.18047545] [ 278.40835644 212.0666412 ] [ 276.98014556 237.77141369] [ 271.45553527 253.54568044] [ 269.64725658 269.74516075] [ 273.66807092 285.92694423] [ 285.28421434 296.96899469] [ 297.78244563 225.63579825] [ 313.8174885 225.34908485] [ 329.81669589 225.02463786] [ 346.47846266 224.91520497] [ 358.4812571 205.90181359] [ 361.68587905 214.74627043] [ 364.25123855 223.83015188] [ 362.19733902 233.34354907] [ 360.02786142 241.93427385] [ 299.02460418 171.08045808] [ 293.72807201 181.01709099] [ 294.38091032 192.35813271] [ 302.78048715 201.97298055] [ 304.32042702 191.7512151 ] [ 303.97649996 180.05676236] [ 303.15684361 247.58257376] [ 295.01206601 258.3793697 ] [ 295.26917961 269.62070089] [ 300.94121189 278.97420418] [ 305.40384661 270.35991267] [ 305.41826875 258.99514809] [ 389.80503977 190.25325085] [ 386.2454501 203.69397165] [ 383.81179746 215.67979947] [ 386.73336044 223.54923825] [ 384.62733147 232.35084859] [ 388.55912639 244.39104532] [ 392.16809038 256.7374104 ] [ 401.23753766 244.24678196] [ 405.25316831 232.59708244] [ 405.80244497 223.33753446] [ 404.53271651 214.73021935] [ 400.09129801 203.31302295] [ 390.59873412 195.06175848] [ 391.77573869 215.29000397] [ 393.35607505 223.26826962] [ 392.39806969 232.44697556] [ 392.50805944 251.56116003] [ 393.65204833 232.52086496] [ 394.38728346 223.68225595] [ 393.07540658 215.53054117]]
可以看到一个个set 组合成一个list，因此要按照这个格式读进一个个文件。
version: 1
n_points: 68
{
307.397025383 174.430156899
331.804216682 175.388580626
356.690186475 178.531311836
381.010974133 182.860924104
405.05022191 189.438234189
427.341033726 199.98372779
445.670864088 216.042828932
457.592641975 237.193008389
460.075116671 263.487833871
455.510316457 290.911816857
442.83717274 314.56022734
426.130537997 334.708180113
404.874486553 349.486673911
380.460838878 357.553700606
354.378835892 361.646130926
328.08664661 363.560754212
302.013018174 364.21864476
288.301426996 182.112606765
275.361112246 192.003731416
271.07088503 208.850184659
272.489416253 226.960725095
277.5323471 243.660718015
275.169761543 270.044873064
268.058836316 287.390249892
265.094428378 305.994912089
267.61472273 324.386717408
278.111813924 338.595949501
291.609241133 256.753812273
306.091627608 256.041571961
320.367298921 255.261105081
335.493007772 254.414976777
352.884488309 237.367406881
355.048082219 246.818760318
356.619595078 256.46932532
354.208150036 267.736018467
351.275628193 277.82987159
299.689443987 200.987756331
293.173525901 210.43218388
292.490674502 222.34708885
298.721927732 233.722888197
301.445562176 222.944147953
302.404713408 210.941696504
295.90254648 285.024236385
287.873807258 296.492105623
287.990106171 308.918375125
293.293389635 319.524819044
296.820904726 309.779900547
296.969855495 297.384900772
395.758846885 224.609783372
384.151243268 235.805215575
378.294037423 248.139296314
380.305974794 257.76304618
377.527910534 268.253470524
383.002662685 283.415578439
392.516762014 297.847202239
401.862277858 283.842293228
405.631009862 269.38952889
406.864028273 258.084133355
406.486948011 247.776466117
403.917088355 235.535662763
394.901587608 230.578278488
388.643749864 248.374225942
388.760568018 257.77162377
387.826657942 268.868047681
392.420865945 291.652868114
392.721752722 268.527897109
393.848572811 257.59040575
393.683940006 247.957171109
}
首先一个video里面有多帧，因此需要一个全局变量来计数。在class的 def __init__(self):里面定义
self.cnt = 0
从0开始；
然后再保存的地方：
filename = "/Users/anitafang/Downloads/Datasets/video_Image_480_640/lyp/annot/%d.pts" % self.cnt
f1 = open(filename, 'a')
# f1.writelines( ['{:.2f}'.format(x) for x in self.curr_lmks])
f1.writelines("version: 1\n")
f1.writelines("n_points: 68\n")
f1.writelines("{\n")
for d in self.curr_lmks:
f1.writelines(str(d[0]))
f1.writelines(" ")
f1.writelines(str(d[1]))
f1.writelines("\n ")
f1.writelines("}\n")
f1.close()
self.cnt=self.cnt+1
