python求二维数组最大值

假设一个长度维68的二维数组

[[710 230]
 [712 252]
 [716 276]
 [727 297]
 [740 318]
 [754 341]
 [768 365]
 [783 384]
 [805 391]
 [833 387]
 [862 371]
 [886 351]
 [908 327]
 [923 301]
 [928 271]
 [930 241]
 [931 210]
 [706 207]
 [713 199]
 [726 200]
 [741 204]
 [755 210]
 [792 206]
 [813 198]
 [835 193]
 [857 193]
 [879 198]
 [774 226]
 [772 245]
 [768 265]
 [765 285]
 [756 290]
 [765 294]
 [775 298]
 [788 293]
 [801 290]
 [726 225]
 [734 221]
 [746 222]
 [757 227]
 [746 229]
 [734 229]
 [815 226]
 [826 219]
 [840 219]
 [854 222]
 [842 228]
 [827 228]
 [759 317]
 [764 315]
 [772 316]
 [782 319]
 [795 317]
 [818 318]
 [841 319]
 [820 338]
 [798 346]
 [785 346]
 [773 343]
 [765 333]
 [765 318]
 [773 323]
 [783 325]
 [796 325]
 [834 320]
 [796 330]
 [783 330]
 [773 327]
 [159 227]
 [159 254]
 [160 282]
 [163 308]
 [172 332]
 [188 355]
 [209 375]
 [231 390]
 [256 396]
 [280 393]
 [300 379]
 [317 361]
 [334 340]
 [347 317]
 [353 292]
 [357 267]
 [359 242]
 [196 225]
 [213 217]
 [231 216]
 [249 220]
 [266 226]
 [302 224]
 [317 220]
 [331 218]
 [344 220]
 [352 227]
 [284 251]
 [284 270]
 [284 289]
 [283 308]
 [256 314]
 [268 317]
 [279 321]
 [290 317]
 [299 313]
 [218 250]
 [231 247]
 [244 248]
 [253 254]
 [242 257]
 [229 256]
 [305 254]
 [316 248]
 [327 248]
 [337 251]
 [328 258]
 [316 258]
 [236 342]
 [250 336]
 [264 335]
 [274 337]
 [284 335]
 [294 337]
 [300 343]
 [292 354]
 [282 360]
 [271 361]
 [260 360]
 [248 355]
 [242 342]
 [263 342]
 [273 343]
 [283 342]
 [294 344]
 [283 347]
 [272 348]
 [262 347]]
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max_x = max(array, key=lambda x: x[0])
max_y = max(array, key=lambda x: x[1])
min_x = min(array, key=lambda x: x[0])
min_y = min(array, key=lambda x: x[1])
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然后再取索引

max_x = max(landmarks_reshape, key=lambda x: x[0])[0]
max_y = max(landmarks_reshape, key=lambda x: x[1])[1]
min_x = min(landmarks_reshape, key=lambda x: x[0])[0]
min_y = min(landmarks_reshape, key=lambda x: x[1])[1]
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