Title: Ignore CI lint rule violation in Pickler.memoize
State: closed

This PR ignores the violation of the lint rule E721 in `Pickler.memoize`.

The lint rule violation was introduced in this PR:
- #3182

@lhoestq is there a reason you did not use `isinstance` instead?

As a hotfix, we just ignore the violation of the lint rule.

Fix #6136.

Comments: <details>
<summary>Show benchmarks</summary>

PyArrow==8.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006536 / 0.011353 (-0.004817) | 0.003890 / 0.011008 (-0.007118) | 0.084044 / 0.038508 (0.045536) | 0.071893 / 0.023109 (0.048784) | 0.346926 / 0.275898 (0.071028) | 0.397487 / 0.323480 (0.074007) | 0.004065 / 0.007986 (-0.003921) | 0.003218 / 0.004328 (-0.001111) | 0.064670 / 0.004250 (0.060420) | 0.052414 / 0.037052 (0.015362) | 0.355413 / 0.258489 (0.096924) | 0.398894 / 0.293841 (0.105053) | 0.030763 / 0.128546 (-0.097783) | 0.008590 / 0.075646 (-0.067056) | 0.286857 / 0.419271 (-0.132415) | 0.051126 / 0.043533 (0.007593) | 0.346125 / 0.255139 (0.090986) | 0.395673 / 0.283200 (0.112474) | 0.025766 / 0.141683 (-0.115917) | 1.466238 / 1.452155 (0.014084) | 1.543117 / 1.492716 (0.050400) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.213210 / 0.018006 (0.195204) | 0.451981 / 0.000490 (0.451491) | 0.003784 / 0.000200 (0.003585) | 0.000096 / 0.000054 (0.000041) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.027756 / 0.037411 (-0.009655) | 0.082446 / 0.014526 (0.067920) | 0.095414 / 0.176557 (-0.081142) | 0.151812 / 0.737135 (-0.585323) | 0.096296 / 0.296338 (-0.200042) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.383729 / 0.215209 (0.168520) | 3.835126 / 2.077655 (1.757471) | 1.891972 / 1.504120 (0.387852) | 1.719934 / 1.541195 (0.178739) | 1.899980 / 1.468490 (0.431490) | 0.488741 / 4.584777 (-4.096036) | 3.634120 / 3.745712 (-0.111592) | 3.243314 / 5.269862 (-2.026547) | 2.028382 / 4.565676 (-2.537294) | 0.057355 / 0.424275 (-0.366920) | 0.007717 / 0.007607 (0.000110) | 0.459835 / 0.226044 (0.233790) | 4.591793 / 2.268929 (2.322864) | 2.346861 / 55.444624 (-53.097764) | 2.067357 / 6.876477 (-4.809120) | 2.254954 / 2.142072 (0.112882) | 0.587016 / 4.805227 (-4.218211) | 0.133918 / 6.500664 (-6.366746) | 0.060311 / 0.075469 (-0.015158) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.250016 / 1.841788 (-0.591772) | 19.674333 / 8.074308 (11.600025) | 14.522764 / 10.191392 (4.331372) | 0.145741 / 0.680424 (-0.534683) | 0.018593 / 0.534201 (-0.515608) | 0.392833 / 0.579283 (-0.186450) | 0.408194 / 0.434364 (-0.026170) | 0.455164 / 0.540337 (-0.085174) | 0.622722 / 1.386936 (-0.764214) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006583 / 0.011353 (-0.004770) | 0.004008 / 0.011008 (-0.007000) | 0.064688 / 0.038508 (0.026180) | 0.074969 / 0.023109 (0.051860) | 0.360504 / 0.275898 (0.084606) | 0.396926 / 0.323480 (0.073446) | 0.005190 / 0.007986 (-0.002796) | 0.003363 / 0.004328 (-0.000966) | 0.064372 / 0.004250 (0.060122) | 0.054428 / 0.037052 (0.017376) | 0.361204 / 0.258489 (0.102715) | 0.400917 / 0.293841 (0.107077) | 0.031117 / 0.128546 (-0.097429) | 0.008406 / 0.075646 (-0.067241) | 0.069655 / 0.419271 (-0.349617) | 0.048582 / 0.043533 (0.005049) | 0.365396 / 0.255139 (0.110257) | 0.381344 / 0.283200 (0.098145) | 0.023809 / 0.141683 (-0.117874) | 1.472926 / 1.452155 (0.020772) | 1.547298 / 1.492716 (0.054582) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.276912 / 0.018006 (0.258906) | 0.449096 / 0.000490 (0.448607) | 0.018921 / 0.000200 (0.018721) | 0.000111 / 0.000054 (0.000056) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.030237 / 0.037411 (-0.007174) | 0.088610 / 0.014526 (0.074084) | 0.101529 / 0.176557 (-0.075027) | 0.154070 / 0.737135 (-0.583065) | 0.103471 / 0.296338 (-0.192867) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.416047 / 0.215209 (0.200838) | 4.152374 / 2.077655 (2.074719) | 2.111181 / 1.504120 (0.607061) | 1.943582 / 1.541195 (0.402387) | 2.031729 / 1.468490 (0.563239) | 0.486740 / 4.584777 (-4.098037) | 3.631547 / 3.745712 (-0.114165) | 3.251202 / 5.269862 (-2.018660) | 2.041272 / 4.565676 (-2.524405) | 0.057287 / 0.424275 (-0.366988) | 0.007303 / 0.007607 (-0.000304) | 0.491027 / 0.226044 (0.264982) | 4.906757 / 2.268929 (2.637829) | 2.581694 / 55.444624 (-52.862931) | 2.250996 / 6.876477 (-4.625481) | 2.441771 / 2.142072 (0.299698) | 0.600714 / 4.805227 (-4.204514) | 0.133233 / 6.500664 (-6.367431) | 0.060856 / 0.075469 (-0.014613) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.340062 / 1.841788 (-0.501725) | 19.973899 / 8.074308 (11.899591) | 14.347381 / 10.191392 (4.155989) | 0.166651 / 0.680424 (-0.513773) | 0.018691 / 0.534201 (-0.515510) | 0.393580 / 0.579283 (-0.185703) | 0.409425 / 0.434364 (-0.024939) | 0.474409 / 0.540337 (-0.065929) | 0.649423 / 1.386936 (-0.737514) |

</details>
</details>

![](https://cml.dev/watermark.png#c5da68102297c3639207a7901952d2765a4cdb8b "CML watermark")
_The documentation is not available anymore as the PR was closed or merged._<details>
<summary>Show benchmarks</summary>

PyArrow==8.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006593 / 0.011353 (-0.004760) | 0.004123 / 0.011008 (-0.006885) | 0.084424 / 0.038508 (0.045916) | 0.076867 / 0.023109 (0.053758) | 0.309149 / 0.275898 (0.033251) | 0.348572 / 0.323480 (0.025092) | 0.005463 / 0.007986 (-0.002523) | 0.003440 / 0.004328 (-0.000889) | 0.064604 / 0.004250 (0.060353) | 0.053920 / 0.037052 (0.016868) | 0.345221 / 0.258489 (0.086732) | 0.363209 / 0.293841 (0.069368) | 0.031209 / 0.128546 (-0.097337) | 0.008690 / 0.075646 (-0.066956) | 0.288851 / 0.419271 (-0.130421) | 0.052239 / 0.043533 (0.008707) | 0.308643 / 0.255139 (0.053504) | 0.346407 / 0.283200 (0.063207) | 0.023935 / 0.141683 (-0.117748) | 1.469207 / 1.452155 (0.017052) | 1.532855 / 1.492716 (0.040138) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.290885 / 0.018006 (0.272879) | 0.580561 / 0.000490 (0.580071) | 0.004698 / 0.000200 (0.004498) | 0.000286 / 0.000054 (0.000231) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.028015 / 0.037411 (-0.009396) | 0.081172 / 0.014526 (0.066646) | 0.096822 / 0.176557 (-0.079735) | 0.151355 / 0.737135 (-0.585781) | 0.098017 / 0.296338 (-0.198321) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.384069 / 0.215209 (0.168859) | 3.828635 / 2.077655 (1.750980) | 1.829311 / 1.504120 (0.325192) | 1.672520 / 1.541195 (0.131325) | 1.743944 / 1.468490 (0.275453) | 0.481594 / 4.584777 (-4.103183) | 3.556204 / 3.745712 (-0.189509) | 3.279499 / 5.269862 (-1.990363) | 2.033243 / 4.565676 (-2.532434) | 0.056525 / 0.424275 (-0.367750) | 0.007717 / 0.007607 (0.000109) | 0.466815 / 0.226044 (0.240771) | 4.657022 / 2.268929 (2.388094) | 2.438600 / 55.444624 (-53.006024) | 2.097999 / 6.876477 (-4.778478) | 2.263122 / 2.142072 (0.121049) | 0.636001 / 4.805227 (-4.169226) | 0.147727 / 6.500664 (-6.352937) | 0.059293 / 0.075469 (-0.016176) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.243111 / 1.841788 (-0.598677) | 19.558379 / 8.074308 (11.484071) | 14.141017 / 10.191392 (3.949625) | 0.169840 / 0.680424 (-0.510583) | 0.017912 / 0.534201 (-0.516289) | 0.391325 / 0.579283 (-0.187958) | 0.417169 / 0.434364 (-0.017195) | 0.457129 / 0.540337 (-0.083209) | 0.629907 / 1.386936 (-0.757029) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.006687 / 0.011353 (-0.004666) | 0.004165 / 0.011008 (-0.006844) | 0.064738 / 0.038508 (0.026230) | 0.077286 / 0.023109 (0.054177) | 0.364236 / 0.275898 (0.088338) | 0.393228 / 0.323480 (0.069748) | 0.005451 / 0.007986 (-0.002535) | 0.003547 / 0.004328 (-0.000781) | 0.065761 / 0.004250 (0.061510) | 0.056526 / 0.037052 (0.019474) | 0.365523 / 0.258489 (0.107034) | 0.403331 / 0.293841 (0.109490) | 0.030900 / 0.128546 (-0.097646) | 0.008757 / 0.075646 (-0.066889) | 0.070961 / 0.419271 (-0.348311) | 0.048394 / 0.043533 (0.004861) | 0.365908 / 0.255139 (0.110769) | 0.381197 / 0.283200 (0.097998) | 0.022940 / 0.141683 (-0.118743) | 1.487909 / 1.452155 (0.035754) | 1.532931 / 1.492716 (0.040215) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.317506 / 0.018006 (0.299500) | 0.513391 / 0.000490 (0.512902) | 0.005464 / 0.000200 (0.005264) | 0.000214 / 0.000054 (0.000159) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.032289 / 0.037411 (-0.005122) | 0.090157 / 0.014526 (0.075631) | 0.103514 / 0.176557 (-0.073043) | 0.158236 / 0.737135 (-0.578899) | 0.106554 / 0.296338 (-0.189784) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.406455 / 0.215209 (0.191246) | 4.061563 / 2.077655 (1.983908) | 2.082201 / 1.504120 (0.578081) | 1.914433 / 1.541195 (0.373238) | 2.039342 / 1.468490 (0.570852) | 0.478444 / 4.584777 (-4.106333) | 3.599755 / 3.745712 (-0.145957) | 3.294453 / 5.269862 (-1.975409) | 2.028519 / 4.565676 (-2.537158) | 0.056118 / 0.424275 (-0.368157) | 0.007325 / 0.007607 (-0.000282) | 0.493177 / 0.226044 (0.267132) | 4.926218 / 2.268929 (2.657289) | 2.605033 / 55.444624 (-52.839591) | 2.239933 / 6.876477 (-4.636544) | 2.454210 / 2.142072 (0.312137) | 0.571905 / 4.805227 (-4.233322) | 0.133251 / 6.500664 (-6.367413) | 0.062422 / 0.075469 (-0.013047) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.352752 / 1.841788 (-0.489036) | 20.265109 / 8.074308 (12.190801) | 14.293064 / 10.191392 (4.101672) | 0.169267 / 0.680424 (-0.511157) | 0.018607 / 0.534201 (-0.515594) | 0.393655 / 0.579283 (-0.185628) | 0.402132 / 0.434364 (-0.032232) | 0.477566 / 0.540337 (-0.062772) | 0.651773 / 1.386936 (-0.735163) |

</details>
</details>

![](https://cml.dev/watermark.png#80023f36b2b6678347979421ef973d8969d31306 "CML watermark")