Created
September 18, 2020 17:43
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Python - reference codes
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| ---------------------------------------------------------------------------------------------- | |
| # Listar todos todos arquivos de uma pasta | |
| import glob | |
| files = glob.glob('images/*') | |
| ---------------------------------------------------------------------------------------------- | |
| # Listar todos arquivos de subpastas | |
| import glob | |
| files = glob.glob('images/**/*', recursive=True) | |
| ---------------------------------------------------------------------------------------------- | |
| # Extrar o nome do arquivo do fullpath | |
| import os | |
| f = '/images/part1/image1.png' | |
| filename = os.path.basename(f) | |
| print(filename) # -> image1.png | |
| ---------------------------------------------------------------------------------------------- | |
| # Extrar o path do fullpath | |
| import os | |
| f = '/images/part1/image1.png' | |
| path = os.path.dirname(f) | |
| print(path) # -> /images/part1 | |
| ---------------------------------------------------------------------------------------------- | |
| # Separar nome do arquivo e extensao | |
| import os | |
| (file, ext) = os.path.splitext(filename) | |
| ---------------------------------------------------------------------------------------------- | |
| # Converter uma imagem para base64 | |
| import io | |
| import base64 | |
| def image_to_base64(image, type): | |
| type = 'jpeg' if type == 'jpg' else type | |
| with io.BytesIO() as buffer: | |
| image.save(buffer, type) | |
| return base64.b64encode(buffer.getvalue()).decode() | |
| ---------------------------------------------------------------------------------------------- | |
| # Tornar uma imagem quadrada, preenchendo com `preto` o menor lado | |
| from PIL import Image, ImageOps | |
| def square_image(image): | |
| (w, h) = image.size | |
| if w > h: | |
| border_size = (0, (w-h)//2) | |
| image_size = (w, w) | |
| elif h > w: | |
| border_size = ((h-w)//2, 0) | |
| image_size = (h, h) | |
| else: | |
| return image # Image already square | |
| image = ImageOps.expand(image,border=border_size, fill='black') | |
| image = image.resize(image_size) | |
| return image |
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