mojo_csv

Author: Phelsong

recipes/mojo_csv/README.md

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+# Mojo Csv
+
+Csv parsing library written in pure Mojo
+
+### usage
+
+Add the Modular community channel (https://repo.prefix.dev/modular-community) to your mojoproject.toml file or pixi.toml file in the channels section.
+
+##### Basic Usage
+
+```mojo
+from mojo_csv import CsvReader
+from pathlib import Path
+
+fn main():
+    var csv_path = Path("path/to/csv/file.csv")
+    var reader = CsvReader(csv_path)
+    for i in range(len(reader)):
+        print(reader[i])
+```
+
+##### Optional Usage
+
+```mojo
+from mojo_csv import CsvReader
+from pathlib import Path
+
+fn main():
+    var csv_path = Path("path/to/csv/file.csv")
+    var reader = CsvReader(csv_path, delimiter="|", quotation_mark='*')
+    for i in range(len(reader)):
+        print(reader[i])
+```
+
+### Attributes
+
+```mojo
+reader.raw : String # raw csv string
+reader.raw_length : Int # total number of Chars
+reader.headers : List[String] # first row of csv file
+reader.row_count : Int  # total number of rows T->B
+reader.column_count : Int # total number of columns L->R
+reader.elements : List[String] # all delimited elements
+reader.length : Int # total number of elements
+```
+
+##### Indexing
+
+currently the array is only 1D, so indexing is fairly manual.
+
+```Mojo
+reader[0] # first element
+```

recipes/mojo_csv/recipe.yaml

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+context:
+  version: 1.2.0
+
+package:
+  name: "mojo_csv"
+  version: ${{ version }}
+
+source:
+  - git: https://github.com/Phelsong/mojo_csv
+    rev: e642c060a6fad04b1a42727501c386f812b88e8d
+
+build:
+  number: 0
+  script:
+    - mojo package src -o ${{ PREFIX }}/lib/mojo/mojo_csv.mojopkg
+
+requirements:
+  host:
+    - max >=25.1.0,<26
+  run:
+    - ${{ pin_compatible('max') }}
+
+tests:
+  - script:
+      - if: unix
+        then:
+          - "mojo test_pack.mojo test.csv"
+
+about:
+  homepage: https://github.com/Phelsong/mojo_csv
+  license: APACHE-2.0
+  license_file: LICENSE
+  summary: Csv parsing library written in pure Mojo
+  repository: https://github.com/Phelsong/mojo_csv
+
+extra:
+  maintainers:
+    - phelsong
+  project_name:
+    - mojo_csv

recipes/mojo_csv/test.csv

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+item1,item2,"ite,em3"
+"p""ic", pi c,pic,
+r_i_1,"r_i_2""",r_i_3,

recipes/mojo_csv/test_pack.mojo

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+from collections import Dict, List
+from pathlib import Path, cwd
+from sys import argv, exit
+from testing import assert_true
+
+from mojo_csv import CsvReader
+
+var VALID = List[String](
+    "item1",
+    "item2",
+    '"ite,em3"',
+    '"p""ic"',
+    " pi c",
+    "pic",
+    "r_i_1",
+    '"r_i_2"""',
+    "r_i_3",
+)
+
+
+fn main() raises:
+    var in_csv: Path = Path(argv()[1])
+    var rd = CsvReader(in_csv)
+    print("parsing:", in_csv)
+    print("----------")
+    try:
+        assert_true(rd.col_count == 3)
+        for x in range(len(rd)):
+            print(rd.elements[x])
+            assert_true(
+                rd.elements[x] == VALID[x],
+                String("[{0}] != expected [{1}] at index {2}").format(
+                    rd.elements[x], VALID[x], x
+                ),
+            )
+        print("----------")
+        print("columns:", rd.col_count, "of 3")
+        print("rows:", rd.row_count, "of 3")
+        assert_true(rd.row_count == 3)
+        print("elements:", rd.__len__(), "of 9")
+        assert_true(len(rd.elements) == 9)
+    except AssertionError:
+        print(AssertionError)
+        raise AssertionError
+    print("----------")
+    print("parse successful")