PIP e PIPETTE
- Gerar link
- Outros aplicativos
- Gerar link
- Outros aplicativos
PIP e PIPETTE
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sqlite3.ProgrammingError: Incorrect number of bindings supplied. The current statement uses 1, and there are 74 supplied
You need to pass in a sequence, but you forgot the comma to make your parameters a tuple: cursor.execute('INSERT INTO images VALUES(?)', (img,)) Without the comma, (img) is just a grouped expression, not a tuple, and thus the img string is treated as the input sequence. If that string is 74 characters long, then Python sees that as 74 separate bind values, each one character long. >>> len(img) 74 >>> len((img,)) 1 If you find it easier to read, you can also use a list literal: cursor.execute('INSERT INTO images VALUES(?)', [img]) Originally published at stackoverflow.com .
Linear algebra (numpy.linalg)
Texto e código retirado deste site . Matrix and vector products dot (a, b[, out]) Dot product of two arrays. linalg.multi_dot (arrays) Compute the dot product of two or more arrays in a single function call, while automatically selecting the fastest evaluation order. vdot (a, b) Return the dot product of two vectors. inner (a, b) Inner product of two arrays. outer (a, b[, out]) Compute the outer product of two vectors. matmul (a, b[, out]) Matrix product of two arrays. tensordot (a, b[, axes]) Compute tensor dot product along specified axes for arrays >= 1-D. einsum (subscripts, *operands[, out, dtype, ...]) Evaluates the Einstein summation convention on the operands. linalg.matrix_power (M, n) Raise a square matrix to the (integer) power n . kron (a, b) Kronecker product of two arrays. Decompositions linalg.cholesky (a) Cholesky decomposition. linalg.qr (a[, mode]) Compute the qr factorization of a matrix. linalg.svd (a[, full_matrices, compute_uv]) S
Web Scraping imgur.com
Texto e código retirado deste site . I’m trying to “scrape” images from Imgur using BeautifulSoup and requests but I’m only getting the first page of results. Why? The example URL we’re given is http://imgur.com/r/funny The code uses requests to fetch the HTML and BeautifulSoup with html5lib to parse it. If you don’t have these install already you can use install them using pip e.g. pip install beautifulsoup4 requests html5lib --user One thing to note is that imgur.com has an api . You use it, taking the blue pill—the article ends. You take the red pill—you stay in Wonderland, and I show you how deep a JSON response goes. Remember: all I’m offering is the truth. Nothing more. “Developer Tools” Usually the first step to take is to debug the page in question inside your browser using the “Developer Tools” (although currently it seems to called “Web Developer” in Firefox ) mainly the Inspector tab and the Network tab. So normally when you sc
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