Fix spark imports


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<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) | 0.010844 / 0.011353 (-0.000509) | 0.007329 / 0.011008 (-0.003680) | 0.133764 / 0.038508 (0.095256) | 0.040213 / 0.023109 (0.017103) | 0.413466 / 0.275898 (0.137568) | 0.452860 / 0.323480 (0.129380) | 0.008109 / 0.007986 (0.000123) | 0.005773 / 0.004328 (0.001444) | 0.109969 / 0.004250 (0.105718) | 0.053001 / 0.037052 (0.015949) | 0.416377 / 0.258489 (0.157888) | 0.477486 / 0.293841 (0.183645) | 0.056556 / 0.128546 (-0.071990) | 0.024322 / 0.075646 (-0.051324) | 0.437750 / 0.419271 (0.018479) | 0.087732 / 0.043533 (0.044199) | 0.421540 / 0.255139 (0.166401) | 0.429143 / 0.283200 (0.145944) | 0.144864 / 0.141683 (0.003181) | 1.882785 / 1.452155 (0.430631) | 1.980721 / 1.492716 (0.488005) |

### 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) | 0.285497 / 0.018006 (0.267491) | 0.601820 / 0.000490 (0.601331) | 0.005003 / 0.000200 (0.004804) | 0.000122 / 0.000054 (0.000067) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.030673 / 0.037411 (-0.006739) | 0.126883 / 0.014526 (0.112357) | 0.137677 / 0.176557 (-0.038880) | 0.211504 / 0.737135 (-0.525632) | 0.144752 / 0.296338 (-0.151587) |

### 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) | 0.665845 / 0.215209 (0.450636) | 6.369040 / 2.077655 (4.291385) | 2.708979 / 1.504120 (1.204859) | 2.370842 / 1.541195 (0.829647) | 2.445987 / 1.468490 (0.977497) | 1.260806 / 4.584777 (-3.323971) | 5.979216 / 3.745712 (2.233504) | 3.334350 / 5.269862 (-1.935512) | 2.187298 / 4.565676 (-2.378379) | 0.155494 / 0.424275 (-0.268781) | 0.017351 / 0.007607 (0.009744) | 0.853626 / 0.226044 (0.627581) | 8.375001 / 2.268929 (6.106072) | 3.528312 / 55.444624 (-51.916313) | 2.890509 / 6.876477 (-3.985968) | 3.051016 / 2.142072 (0.908944) | 1.529811 / 4.805227 (-3.275416) | 0.273883 / 6.500664 (-6.226781) | 0.086617 / 0.075469 (0.011148) |

### 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) | 1.648231 / 1.841788 (-0.193557) | 19.487109 / 8.074308 (11.412801) | 23.474621 / 10.191392 (13.283229) | 0.221392 / 0.680424 (-0.459032) | 0.028878 / 0.534201 (-0.505323) | 0.582302 / 0.579283 (0.003019) | 0.615059 / 0.434364 (0.180695) | 0.656082 / 0.540337 (0.115745) | 0.740544 / 1.386936 (-0.646392) |

</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) | 0.010687 / 0.011353 (-0.000665) | 0.007114 / 0.011008 (-0.003894) | 0.135426 / 0.038508 (0.096918) | 0.041027 / 0.023109 (0.017918) | 0.466441 / 0.275898 (0.190543) | 0.503545 / 0.323480 (0.180065) | 0.009418 / 0.007986 (0.001432) | 0.004976 / 0.004328 (0.000647) | 0.101342 / 0.004250 (0.097092) | 0.058289 / 0.037052 (0.021237) | 0.473715 / 0.258489 (0.215226) | 0.539556 / 0.293841 (0.245715) | 0.063138 / 0.128546 (-0.065408) | 0.020429 / 0.075646 (-0.055217) | 0.124179 / 0.419271 (-0.295093) | 0.066400 / 0.043533 (0.022867) | 0.450793 / 0.255139 (0.195654) | 0.494163 / 0.283200 (0.210964) | 0.131179 / 0.141683 (-0.010504) | 1.876396 / 1.452155 (0.424241) | 1.974148 / 1.492716 (0.481432) |

### 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) | 0.313362 / 0.018006 (0.295356) | 0.602618 / 0.000490 (0.602129) | 0.008279 / 0.000200 (0.008079) | 0.000155 / 0.000054 (0.000101) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.037250 / 0.037411 (-0.000161) | 0.144151 / 0.014526 (0.129625) | 0.155733 / 0.176557 (-0.020824) | 0.214334 / 0.737135 (-0.522801) | 0.167124 / 0.296338 (-0.129214) |

### 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) | 0.686471 / 0.215209 (0.471262) | 6.749174 / 2.077655 (4.671520) | 3.024941 / 1.504120 (1.520821) | 2.553363 / 1.541195 (1.012168) | 2.679107 / 1.468490 (1.210617) | 1.317212 / 4.584777 (-3.267565) | 5.917575 / 3.745712 (2.171862) | 3.412715 / 5.269862 (-1.857146) | 2.203478 / 4.565676 (-2.362198) | 0.150387 / 0.424275 (-0.273888) | 0.015977 / 0.007607 (0.008370) | 0.862999 / 0.226044 (0.636954) | 8.706459 / 2.268929 (6.437530) | 3.762648 / 55.444624 (-51.681977) | 2.992544 / 6.876477 (-3.883933) | 3.135796 / 2.142072 (0.993724) | 1.504140 / 4.805227 (-3.301088) | 0.268265 / 6.500664 (-6.232399) | 0.083297 / 0.075469 (0.007828) |

### 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) | 1.690193 / 1.841788 (-0.151594) | 19.912854 / 8.074308 (11.838546) | 23.568217 / 10.191392 (13.376825) | 0.285125 / 0.680424 (-0.395299) | 0.030593 / 0.534201 (-0.503608) | 0.565305 / 0.579283 (-0.013978) | 0.659283 / 0.434364 (0.224919) | 0.678864 / 0.540337 (0.138527) | 0.793634 / 1.386936 (-0.593302) |

</details>
</details>

![](https://cml.dev/watermark.png#9d0edbe3f3258b7e580d1b58c0eea6637b5e22b2 "CML watermark")


<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) | 0.011615 / 0.011353 (0.000262) | 0.006716 / 0.011008 (-0.004292) | 0.146868 / 0.038508 (0.108360) | 0.037621 / 0.023109 (0.014512) | 0.425563 / 0.275898 (0.149664) | 0.483217 / 0.323480 (0.159737) | 0.007830 / 0.007986 (-0.000156) | 0.005940 / 0.004328 (0.001612) | 0.100771 / 0.004250 (0.096521) | 0.063907 / 0.037052 (0.026854) | 0.422993 / 0.258489 (0.164503) | 0.496514 / 0.293841 (0.202673) | 0.056004 / 0.128546 (-0.072542) | 0.021441 / 0.075646 (-0.054206) | 0.453589 / 0.419271 (0.034317) | 0.067555 / 0.043533 (0.024022) | 0.442490 / 0.255139 (0.187351) | 0.503941 / 0.283200 (0.220742) | 0.134023 / 0.141683 (-0.007660) | 1.886329 / 1.452155 (0.434175) | 2.030867 / 1.492716 (0.538150) |

### 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) | 0.288063 / 0.018006 (0.270057) | 0.627177 / 0.000490 (0.626687) | 0.006335 / 0.000200 (0.006135) | 0.000171 / 0.000054 (0.000116) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.032424 / 0.037411 (-0.004987) | 0.132749 / 0.014526 (0.118223) | 0.144727 / 0.176557 (-0.031829) | 0.232577 / 0.737135 (-0.504558) | 0.157315 / 0.296338 (-0.139024) |

### 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) | 0.623058 / 0.215209 (0.407849) | 6.272447 / 2.077655 (4.194792) | 2.506778 / 1.504120 (1.002658) | 2.203094 / 1.541195 (0.661899) | 2.346972 / 1.468490 (0.878482) | 1.358498 / 4.584777 (-3.226279) | 5.879670 / 3.745712 (2.133958) | 5.818406 / 5.269862 (0.548545) | 3.231936 / 4.565676 (-1.333741) | 0.154013 / 0.424275 (-0.270263) | 0.021541 / 0.007607 (0.013934) | 0.823746 / 0.226044 (0.597702) | 8.140304 / 2.268929 (5.871375) | 3.366911 / 55.444624 (-52.077714) | 2.696856 / 6.876477 (-4.179621) | 2.845743 / 2.142072 (0.703671) | 1.522363 / 4.805227 (-3.282864) | 0.278938 / 6.500664 (-6.221726) | 0.085044 / 0.075469 (0.009575) |

### 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) | 1.681348 / 1.841788 (-0.160440) | 19.686703 / 8.074308 (11.612395) | 22.995655 / 10.191392 (12.804263) | 0.218876 / 0.680424 (-0.461548) | 0.029334 / 0.534201 (-0.504867) | 0.560846 / 0.579283 (-0.018438) | 0.645210 / 0.434364 (0.210846) | 0.697842 / 0.540337 (0.157505) | 0.832875 / 1.386936 (-0.554061) |

</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) | 0.009509 / 0.011353 (-0.001844) | 0.006471 / 0.011008 (-0.004537) | 0.101477 / 0.038508 (0.062969) | 0.035281 / 0.023109 (0.012171) | 0.470032 / 0.275898 (0.194134) | 0.501475 / 0.323480 (0.177995) | 0.007641 / 0.007986 (-0.000344) | 0.006784 / 0.004328 (0.002455) | 0.096111 / 0.004250 (0.091861) | 0.055199 / 0.037052 (0.018146) | 0.470095 / 0.258489 (0.211606) | 0.530955 / 0.293841 (0.237114) | 0.056161 / 0.128546 (-0.072385) | 0.022055 / 0.075646 (-0.053591) | 0.121585 / 0.419271 (-0.297686) | 0.063736 / 0.043533 (0.020203) | 0.470771 / 0.255139 (0.215632) | 0.490546 / 0.283200 (0.207346) | 0.128825 / 0.141683 (-0.012858) | 1.898639 / 1.452155 (0.446484) | 2.052305 / 1.492716 (0.559589) |

### 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) | 0.322526 / 0.018006 (0.304520) | 0.628096 / 0.000490 (0.627607) | 0.006837 / 0.000200 (0.006637) | 0.000199 / 0.000054 (0.000145) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.033830 / 0.037411 (-0.003581) | 0.136217 / 0.014526 (0.121691) | 0.147006 / 0.176557 (-0.029551) | 0.203950 / 0.737135 (-0.533185) | 0.150327 / 0.296338 (-0.146011) |

### 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) | 0.654287 / 0.215209 (0.439078) | 6.430306 / 2.077655 (4.352651) | 2.881750 / 1.504120 (1.377630) | 2.489505 / 1.541195 (0.948310) | 2.543037 / 1.468490 (1.074547) | 1.226682 / 4.584777 (-3.358094) | 5.902076 / 3.745712 (2.156364) | 3.335344 / 5.269862 (-1.934518) | 2.156738 / 4.565676 (-2.408939) | 0.151804 / 0.424275 (-0.272472) | 0.015238 / 0.007607 (0.007631) | 0.816364 / 0.226044 (0.590319) | 8.126367 / 2.268929 (5.857438) | 3.653222 / 55.444624 (-51.791402) | 2.886667 / 6.876477 (-3.989809) | 3.120852 / 2.142072 (0.978779) | 1.421423 / 4.805227 (-3.383804) | 0.264590 / 6.500664 (-6.236074) | 0.085716 / 0.075469 (0.010247) |

### 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) | 1.745258 / 1.841788 (-0.096530) | 19.379253 / 8.074308 (11.304945) | 23.827046 / 10.191392 (13.635654) | 0.267702 / 0.680424 (-0.412722) | 0.030253 / 0.534201 (-0.503948) | 0.542037 / 0.579283 (-0.037246) | 0.655946 / 0.434364 (0.221582) | 0.683525 / 0.540337 (0.143188) | 0.831333 / 1.386936 (-0.555603) |

</details>
</details>

![](https://cml.dev/watermark.png#5b011a258329375aa4dc7b414bd4e7b6363c5357 "CML watermark")