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  1. # Archivos en Python
  2.  
  3.  
  4. import csv
  5. import json
  6. import pandas as pd
  7. import matplotlib.pyplot as plt
  8.  
  9.  
  10. class Pokemon:
  11.     # Type hints: herramientas como mypy
  12.     # (11, "metapod", 0.7, 9.9, "bicho")   # pokemon putativo
  13.     def __init__(self,
  14.                  nid: int = 11,
  15.                  nombre: str = "metapod",
  16.                  altura: float = 0.7,
  17.                  peso: float = 9.9,
  18.                  tipo: str = "bicho"):
  19.         self._nid = nid
  20.         self._nombre = nombre
  21.         self._altura = altura
  22.         self._peso = peso
  23.         self._tipo = tipo
  24.  
  25.  
  26.     def to_list(self):
  27.         return [
  28.             self._nid,
  29.             self._nombre,
  30.             self._altura,
  31.             self._peso,
  32.             self._tipo]
  33.  
  34.     def __str__(self):
  35.         return f"{self._nid}/{self._nombre}: {self._altura} m. {self._peso} kg." \
  36.                 + f" -- {self._tipo}"
  37.  
  38.  
  39. def crea_pokemons():
  40.     return [
  41.         Pokemon(1,   "bulbosaur", 0.7, 6.9,  "planta"), 
  42.         Pokemon(25,  "pikachu",   0.4, 6.0,  "eléctrico"),
  43.         Pokemon(26,  "raichu",    0.8, 30.0, "eléctrico"),
  44.         Pokemon(257, "blaziken",  1.9, 52.0, "fuego"),
  45.     ]
  46.  
  47.  
  48. def guarda_pokemons_txt(pokemons: list[Pokemon]):
  49.     with open("pokemons.txt", "wt", encoding="utf-8") as f:
  50.         for p in pokemons:
  51.             print(str(p), file=f)
  52.             #f.write(str(p) + "\n")
  53.  
  54.  
  55. def recupera_archivo_pokemons_txt(nf: str):
  56.     with open(nf, "rt") as f:
  57.         for linea in f:
  58.             print(linea.strip())
  59.  
  60.  
  61. def guarda_pokemons_csv(pokemons: list[Pokemon]):
  62.     with open("pokemons.csv", "wt", encoding="utf-8") as f:
  63.         print("nid,nombre,altura,peso,tipo", file=f)
  64.         w = csv.writer(f)
  65.         for p in pokemons:
  66.             w.writerow(p.to_list())
  67.  
  68.  
  69. def guarda_pokemons_json(pokemons: list[Pokemon]):
  70.     pokemon_dicts = [p.__dict__ for p in pokemons]
  71.     with open("pokemons.json", "wt", encoding="utf-8") as f:
  72.         json.dump(pokemon_dicts, f)
  73.  
  74.  
  75. def recupera_archivo_pokemons_json(nf: str) -> list[Pokemon]:
  76.     toret: list[Pokemon] = []
  77.  
  78.     with open(nf, "rt") as f:
  79.         pokemon_dicts = json.load(f)
  80.  
  81.     for pd in pokemon_dicts:
  82.         p = Pokemon()
  83.         p.__dict__ = pd
  84.         toret.append(p)
  85.  
  86.     return toret
  87.  
  88.  
  89. def recupera_archivo_pokemons_csv(nf: str) -> list[Pokemon]:
  90.     toret: list[Pokemon] = []
  91.  
  92.     with open(nf, "rt") as f:
  93.         r = csv.DictReader(f)
  94.         for linea in r:
  95.             toret.append(
  96.                 Pokemon(
  97.                     int(linea["nid"]),
  98.                     linea["nombre"],
  99.                     float(linea["altura"]),
  100.                     float(linea["peso"]),
  101.                     linea["tipo"]))
  102.  
  103.     return toret
  104.  
  105.  
  106. def crea_archivo_pokemons_txt():
  107.     pokemons = crea_pokemons()
  108.     guarda_pokemons_txt(pokemons)
  109.  
  110.  
  111. def lee_archivo_pokemons_txt():
  112.     recupera_archivo_pokemons_txt("pokemons.txt")
  113.  
  114.  
  115. def crea_archivo_pokemons_csv():
  116.     pokemons = crea_pokemons()
  117.     guarda_pokemons_csv(pokemons)
  118.  
  119.  
  120. def lee_archivo_pokemons_csv():
  121.     pokemons = recupera_archivo_pokemons_csv("pokemons.csv")
  122.     for p in pokemons:
  123.         print(p)
  124.  
  125.  
  126. def lee_archivo_pokemons_json():
  127.     pokemons = recupera_archivo_pokemons_json("pokemons.json")
  128.     for p in pokemons:
  129.         print(p)
  130.  
  131.  
  132. def crea_archivo_pokemons_json():
  133.     pokemons = crea_pokemons()
  134.     guarda_pokemons_json(pokemons)
  135.  
  136.  
  137. def lee_archivo_pokemons_csv_pandas():
  138.     dfp: pd.DataFrame = pd.read_csv("pokemons.csv")
  139.     print("Todos los pokemons\n", dfp)
  140.  
  141.     df_nombre_peso = dfp[["nombre", "peso"]]
  142.     print("Todos los pokemons (nombre y peso)\n", df_nombre_peso)
  143.  
  144.     print("Todos los pokemons (nombre)\n", dfp[["nombre"]])
  145.     dfp.altura.hist()
  146.     plt.xlabel("Alturas")
  147.     plt.ylabel("Cuántos")
  148.     plt.show()
  149.  
  150.  
  151. def main():
  152.     # crea_archivo_pokemons_txt()
  153.     # lee_archivo_pokemons_txt()
  154.     # crea_archivo_pokemons_csv()
  155.     # lee_archivo_pokemons_csv()
  156.     # crea_archivo_pokemons_json()
  157.     # lee_archivo_pokemons_json()
  158.     lee_archivo_pokemons_csv_pandas()
  159.  
  160.  
  161. if __name__ == "__main__":
  162.     main()
  163.  
Runtime error #stdin #stdout #stderr 7.47s 104528KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Fontconfig error: No writable cache directories
Traceback (most recent call last):
  File "./prog.py", line 162, in <module>
  File "./prog.py", line 158, in main
  File "./prog.py", line 138, in lee_archivo_pokemons_csv_pandas
  File "/usr/local/lib/python3.12/dist-packages/pandas/io/parsers/readers.py", line 1026, in read_csv
    return _read(filepath_or_buffer, kwds)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/dist-packages/pandas/io/parsers/readers.py", line 620, in _read
    parser = TextFileReader(filepath_or_buffer, **kwds)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/dist-packages/pandas/io/parsers/readers.py", line 1620, in __init__
    self._engine = self._make_engine(f, self.engine)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/dist-packages/pandas/io/parsers/readers.py", line 1880, in _make_engine
    self.handles = get_handle(
                   ^^^^^^^^^^^
  File "/usr/local/lib/python3.12/dist-packages/pandas/io/common.py", line 873, in get_handle
    handle = open(
             ^^^^^
FileNotFoundError: [Errno 2] No such file or directory: 'pokemons.csv'
https://ideone.com/CLrEhS
Creación y lectura de archivos txt, csv, json en Python
language:
Python 3 (python  3.12)
created:
56 days ago
visibility:
public

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