From 3f1668537a09ad0106b741b99e063620f380fc32 Mon Sep 17 00:00:00 2001
From: James McKinney <26463+jpmckinney@users.noreply.github.com>
Date: Sat, 28 Sep 2024 14:10:56 -0400
Subject: [PATCH] chore: Remove pandas

---
 generic_scrapy/base_spiders/base_spider.py   | 16 ++++++++--------
 generic_scrapy/commands/incrementalupdate.py | 18 +++++++++---------
 requirements.in                              |  1 -
 requirements.txt                             | 11 -----------
 requirements_dev.txt                         | 19 -------------------
 5 files changed, 17 insertions(+), 48 deletions(-)

diff --git a/generic_scrapy/base_spiders/base_spider.py b/generic_scrapy/base_spiders/base_spider.py
index f9fd490..5b37551 100644
--- a/generic_scrapy/base_spiders/base_spider.py
+++ b/generic_scrapy/base_spiders/base_spider.py
@@ -3,6 +3,13 @@
 import scrapy
 from scrapy.exceptions import UsageError
 
+VALID_DATE_FORMATS = {
+    "date": "%Y-%m-%d",
+    "datetime": "%Y-%m-%dT%H:%M:%S",
+    "year": "%Y",
+    "year-month": "%Y-%m",
+}
+
 
 class BaseSpider(scrapy.Spider):
     """
@@ -27,13 +34,6 @@ class BaseSpider(scrapy.Spider):
 
     """
 
-    VALID_DATE_FORMATS = {
-        "date": "%Y-%m-%d",
-        "datetime": "%Y-%m-%dT%H:%M:%S",
-        "year": "%Y",
-        "year-month": "%Y-%m",
-    }
-
     # Regarding the data source.
     date_format = "datetime"
     date_required = False
@@ -63,7 +63,7 @@ def __init__(
         self.from_date = from_date
         self.until_date = until_date
 
-        self.date_format = self.VALID_DATE_FORMATS[self.date_format]
+        self.date_format = VALID_DATE_FORMATS[self.date_format]
 
         # Related to incremental crawls.
         if crawl_directory:
diff --git a/generic_scrapy/commands/incrementalupdate.py b/generic_scrapy/commands/incrementalupdate.py
index 0b2782f..29fa7bf 100644
--- a/generic_scrapy/commands/incrementalupdate.py
+++ b/generic_scrapy/commands/incrementalupdate.py
@@ -1,11 +1,11 @@
+import csv
 import os.path
 from datetime import datetime, timedelta
 
-import pandas as pd
 from scrapy.commands import ScrapyCommand
 from scrapy.exceptions import UsageError
 
-from generic_scrapy.base_spiders.base_spider import BaseSpider
+from generic_scrapy.base_spiders.base_spider import VALID_DATE_FORMATS
 
 
 class IncrementalUpdate(ScrapyCommand):
@@ -24,7 +24,7 @@ def add_options(self, parser):
         parser.add_argument(
             "--date_field_name",
             type=str,
-            help="The data field to use for checking for the number of items downloaded the last time.",
+            help="The date field to use for checking for the number of items downloaded the last time.",
         )
         parser.add_argument(
             "--crawl_directory",
@@ -50,12 +50,12 @@ def run(self, args, opts):
 
         max_date = None
         if opts.date_field_name:
-            directory = spidercls.get_file_store_directory()
-            file_name = f"{spidercls.export_outputs['main']['name']}.csv"
-            max_date = pd.read_csv(os.path.join(directory, file_name))[opts.date_field_name].agg(["max"])["max"]
-            max_date = datetime.strptime(max_date, BaseSpider.VALID_DATE_FORMATS["datetime"]).replace(
-                tzinfo=datetime.timezone.utc
-            ) + timedelta(seconds=1)
+            with open(
+                os.path.join(spidercls.get_file_store_directory(), f"{spidercls.export_outputs['main']['name']}.csv")
+            ) as f:
+                max_date = datetime.strptime(
+                    max(row[opts.date_field_name] for row in csv.DictReader(f)), VALID_DATE_FORMATS["datetime"]
+                ).replace(tzinfo=datetime.timezone.utc) + timedelta(seconds=1)
 
         self.crawler_process.crawl(spidercls, from_date=max_date, crawl_directory=opts.crawl_directory)
         self.crawler_process.start()
diff --git a/requirements.in b/requirements.in
index acdade7..268b0db 100644
--- a/requirements.in
+++ b/requirements.in
@@ -1,2 +1 @@
-pandas
 scrapy
diff --git a/requirements.txt b/requirements.txt
index 0b324dc..0b4de64 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,14 +51,10 @@ lxml==4.9.3
     # via
     #   parsel
     #   scrapy
-numpy==1.25.2
-    # via pandas
 packaging==23.1
     # via
     #   parsel
     #   scrapy
-pandas==2.0.3
-    # via -r requirements.in
 parsel==1.8.1
     # via
     #   itemloaders
@@ -77,10 +73,6 @@ pydispatcher==2.0.7
     # via scrapy
 pyopenssl==24.2.1
     # via scrapy
-python-dateutil==2.8.2
-    # via pandas
-pytz==2023.3
-    # via pandas
 queuelib==1.6.2
     # via scrapy
 requests==2.32.3
@@ -101,7 +93,6 @@ setuptools==74.1.1
 six==1.16.0
     # via
     #   automat
-    #   python-dateutil
     #   requests-file
 tldextract==3.4.4
     # via scrapy
@@ -111,8 +102,6 @@ twisted==24.7.0rc1
     # via scrapy
 typing-extensions==4.7.1
     # via twisted
-tzdata==2023.3
-    # via pandas
 urllib3==2.2.2
     # via requests
 w3lib==2.1.2
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 974b685..e7edf09 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -78,17 +78,11 @@ lxml==4.9.3
     #   -r requirements.txt
     #   parsel
     #   scrapy
-numpy==1.25.2
-    # via
-    #   -r requirements.txt
-    #   pandas
 packaging==23.1
     # via
     #   -r requirements.txt
     #   parsel
     #   scrapy
-pandas==2.0.3
-    # via -r requirements.txt
 parsel==1.8.1
     # via
     #   -r requirements.txt
@@ -119,14 +113,6 @@ pyopenssl==24.2.1
     # via
     #   -r requirements.txt
     #   scrapy
-python-dateutil==2.8.2
-    # via
-    #   -r requirements.txt
-    #   pandas
-pytz==2023.3
-    # via
-    #   -r requirements.txt
-    #   pandas
 queuelib==1.6.2
     # via
     #   -r requirements.txt
@@ -156,7 +142,6 @@ six==1.16.0
     # via
     #   -r requirements.txt
     #   automat
-    #   python-dateutil
     #   requests-file
 tldextract==3.4.4
     # via
@@ -174,10 +159,6 @@ typing-extensions==4.7.1
     # via
     #   -r requirements.txt
     #   twisted
-tzdata==2023.3
-    # via
-    #   -r requirements.txt
-    #   pandas
 urllib3==2.2.2
     # via
     #   -r requirements.txt