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How to use try_mask method in hypothesis

Best Python code snippet using hypothesis

bitstuf.py

Source:bitstuf.py

1#!/usr/bin/env python2# Tool for testing bitstuffing implementations3#4# Copyright (C) 2022  Kevin O'Connor <kevin@koconnor.net>5#6# This file may be distributed under the terms of the GNU GPLv3 license.7import sys8TESTBITS=209def report(msg):10    sys.stderr.write("\n" + msg + "\n")11LOOP = UNLOOP = 012def bitstuf(b, num_bits):13    global LOOP14    edges = b ^ (b >> 1)15    count = num_bits16    i = num_bits-117    while i >= 0:18        LOOP += 119        if not ((edges >> i) & 0xf):20            mask = (1 << (i + 1)) - 121            low = b & mask22            high = (b & ~(mask >> 1)) << 123            b = high ^ low ^ (1 << i)24            i -= 325            count += 126            edges = b ^ (b >> 1)27        i -= 128    return b, count29def bitstuf_batch(b, num_bits):30    global LOOP31    count = num_bits32    while 1:33        edges = b ^ (b >> 1)34        e2 = edges | (edges >> 1)35        e4 = e2 | (e2 >> 2)36        add_bits = ~e437        try_cnt = num_bits38        while 1:39            LOOP += 140            try_mask = ((1 << try_cnt) - 1) << (num_bits - try_cnt)41            if not add_bits & try_mask:42                # No stuff bits needed in try_cnt bits43                if try_cnt >= num_bits:44                    return b, count45                num_bits -= try_cnt46                try_cnt = (num_bits + 1) // 247                continue48            if add_bits & (1 << (num_bits - 1)):49                # A stuff bit must be inserted prior to the high bit50                low_mask = (1 << num_bits) - 151                low = b & low_mask52                high = (b & ~(low_mask >> 1)) << 153                b = high ^ low ^ (1 << (num_bits - 1))54                count += 155                if num_bits <= 4:56                    return b, count57                num_bits -= 458                break59            # High bit doesn't need stuff bit - accept it, limit try_cnt, retry60            num_bits -= 161            try_cnt //= 262def bitunstuf(sb, num_bits):63    global UNLOOP64    edges = sb ^ (sb >> 1)65    unstuffed_bits = 066    cu = TESTBITS67    cs = num_bits68    while 1:69        UNLOOP += 170        if not cu:71            # Extracted desired bits72            return unstuffed_bits73        if not cs:74            # Need more data75            return -99976        cs -= 177        if (edges >> (cs+1)) & 0xf:78            # Normal data79            cu -= 180            unstuffed_bits |= ((sb >> cs) & 1) << cu81        elif ((edges >> cs) & 0x1f) == 0x00:82            # Six consecutive bits - a bitstuff error83            if (sb >> cs) & 1:84                return -cs85            return -cs86def bitunstuf_batch(sb, num_bits):87    global UNLOOP88    edges = sb ^ (sb >> 1)89    e2 = edges | (edges >> 1)90    e4 = e2 | (e2 >> 2)91    rm_bits = ~e492    unstuffed_bits = 093    cu = TESTBITS94    cs = num_bits95    while 1:96        try_cnt = cu if cu < cs else cs97        while 1:98            UNLOOP += 199            try_mask = ((1 << try_cnt) - 1) << (cs + 1 - try_cnt)100            if not (rm_bits & try_mask):101                # No stuff bits in try_cnt bits - copy into unstuffed_bits102                cu -= try_cnt103                cs -= try_cnt104                unstuffed_bits |= ((sb >> cs) & ((1 << try_cnt) - 1)) << cu105                if not cu:106                    # Extracted desired bits107                    return unstuffed_bits108                break109            cs -= 1110            if rm_bits & (1 << (cs + 1)):111                # High bit of try_cnt a stuff bit112                if rm_bits & (1 << cs):113                    # Six consecutive bits - a bitstuff error114                    if (sb >> cs) & 1:115                        return -cs116                    return -cs117                break118            # High bit not a stuff bit - limit try_cnt and retry119            cu -= 1120            unstuffed_bits |= ((sb >> cs) & 1) << cu121            try_cnt //= 2122        if not cs:123            # Need more data124            return -999125def bitunstuf_batch_pass4(sb, num_bits):126    global UNLOOP127    edges = sb ^ (sb >> 1)128    e2 = edges | (edges >> 1)129    e4 = e2 | (e2 >> 2)130    rm_bits = ~e4131    unstuffed_bits = 0132    cu = TESTBITS133    cs = num_bits134    try_cnt = cu if cu < cs else cs135    while 1:136        UNLOOP += 1137        pass_cnt = try_cnt138        try_mask = ((1 << try_cnt) - 1) << (cs + 1 - try_cnt)139        if rm_bits & try_mask:140            # There is a stuff bit somewhere in try_cnt141            if rm_bits & (1 << cs):142                # High bit is a stuff bit143                cs -= 1144                if rm_bits & (1 << cs):145                    # Six consecutive bits - a bitstuff error146                    if (sb >> cs) & 1:147                        return -cs148                    return -cs149                rem_cnt = cu if cu < cs else cs150                pass_cnt = try_cnt = rem_cnt if rem_cnt < 4 else 4151            else:152                # High bit is not a stuff bit - pass 1, limit try_cnt, retry153                pass_cnt = 1154        # Copy pass_cnt bits into unstuffed_bits155        cu -= pass_cnt156        cs -= pass_cnt157        unstuffed_bits |= ((sb >> cs) & ((1 << pass_cnt) - 1)) << cu158        if not cu:159            # Extracted desired bits160            return unstuffed_bits161        if not cs:162            # Need more data163            return -999164        if pass_cnt >= try_cnt:165            try_cnt = cu if cu < cs else cs166        else:167            try_cnt //= 2168def main():169    stuf_func = bitstuf_batch170    unstuf_func = bitunstuf_batch171    for i in range(1<<TESTBITS):172        if not i % (1<<12):173            sys.stdout.write('.')174            sys.stdout.flush()175        val = i | (1 << (TESTBITS+1))176        sv, sc = stuf_func(val, TESTBITS)177        uv = unstuf_func(sv, sc)178        if i != uv:179            report("Mismatch on %d: %s -> %s -> %s (%d)"180                   % (i, format(val, '025b'), format(sv, '025b')181                      , format(uv, '025b'), sv))182            sys.exit(-1)183    report("Test completed successfully (avg passes: %.3f stuff, %.3f unstuff)"184           % (LOOP / (1<<TESTBITS), UNLOOP / (1<<TESTBITS)))185    # Verify bit stuff errors are detected186    if (unstuf_func(0b1100111100000011, 16) != -2187        or unstuf_func(0b1101111110000000, 16) != -7):188        report("Didn't detect stuff error")189        sys.exit(-1)190if __name__ == '__main__':...

dir_utils.py

Source:dir_utils.py

1import os2import sys3from datetime import datetime4ANO = str(datetime.now().year)5def pega_fontes():6    fontes = []7    for drive in pega_letras():8        for dir in os.listdir(drive):9            if os.path.isdir(os.path.join(drive, dir)):10                try:11                    caminho = os.path.join(drive, dir)12                    if not detecta_mascara(caminho) == []:13                        fontes.append(caminho)14                except ValueError:15                    continue16    return fontes17def pega_letras():18    drives = []19    if sys.platform == 'win32':20        import win32api21        drives = win32api.GetLogicalDriveStrings()22        drives = [drive[:2] for drive in drives.split('\000')[:-1]]23    return drives24def formata_mascaras(pastas: list) -> str:25    mascaras = []26    for nivel, pasta in enumerate(pastas):27        mascaras.append(mask_of_data(pasta, nivel))28    return '/'.join(mascaras)29def mask_of_data(pasta: str, nivel: int = 0) -> bool:30    masks = ('%Y', '%m', '%d')31    compose_masks = ('%Y%m%d', '%Y%m', '%m%d')32    for try_mask in masks[nivel:]:33        try:34            prefix = ''35            if len(pasta) == 1:36                pasta = '0' + pasta37                prefix = '#'38            datetime.strptime(pasta, try_mask)39            return prefix + try_mask40        except ValueError:41            continue42    for try_mask in compose_masks:43        try:44            datetime.strptime(pasta, try_mask)45            return try_mask46        except ValueError:47            continue48    return None49def detecta(caminho: str, pastas: list):50    lpastas = None51    lista_pastas = os.listdir(os.path.join(caminho, *pastas))52    if len(lista_pastas) == 0:53        print('1', pastas)54        return formata_mascaras(pastas)55    if len(pastas) == 0:56        print('2', lista_pastas)57        lpastas = [pasta for pasta in lista_pastas if pasta[:4] == ANO]58        print('2.1', lpastas)59        if len(lpastas) == 0:60            return pastas61    if lpastas:62        pasta = lpastas[0]63    else:64        pasta = lista_pastas[0]65    print('2.2', pasta)66    if mask_of_data(pasta) is not None:67        pastas.append(pasta)68        print('3', pastas)69        return detecta(caminho, pastas)70    if len(pastas) > 0:  # Achou o pote no fim do arco-Ãris71        return formata_mascaras(pastas)72    raise ValueError('Caminho %s invÃ¡lido para a funÃ§Ã£o detecta_mascara!!!'73                     % caminho)74def detecta_mascara(caminho: str):75    mascaras = []...

gen_trimap.py

Source:gen_trimap.py

1#! /usr/bin/python2# -*- coding: utf-8 -*- #3import cv24from PIL import Image, ImageDraw, ImageFont5import numpy as np6def gen_trimap(mask, r = 0.01):7    '''8    generate trimap from segmentation, 9    input:10    mask 0 for bg 1 for fg11    output:12    0, bg13    255, fg14    128, uncertain15    '''16    mask = (mask > 0.5).astype(np.int16)*25517    h, w = mask.shape[:2]18    delta = int(min(h, w) * r) + 3;19    border = get_border(mask);20    kernel = np.ones((delta, delta), np.uint8)21    uncertain = cv2.dilate(border, kernel, iterations=1)22    mask[uncertain > 0] = 12823    return mask.astype(np.uint8)24def get_border(im):25    ddepth = cv2.CV_16S26    dx = cv2.Sobel(im, ddepth, 1, 0)27    dy = cv2.Sobel(im, ddepth, 0, 1)28    dxabs = cv2.convertScaleAbs(dx)29    dyabs = cv2.convertScaleAbs(dy)30    mag = cv2.addWeighted(dxabs, 1, dyabs, 1, 0)31    border = (mag > 0).astype(np.uint8);32    return border33if __name__ == "__main__":34    x = cv2.imread("images/try_mask.png", 0)35    x = (x > 0).astype(np.int16)36    y = get_border(x)37    z = gen_trimap(x)38    cv2.imshow("y", y*255);39    cv2.imshow("z", z);...

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