Path: csiph.com!usenet.pasdenom.info!goblin2!goblin.stu.neva.ru!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.006 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'else:': 0.03; 'run,': 0.07; 'subject:Error': 0.07; 'referenced': 0.09; 'cc:addr:python- list': 0.10; 'def': 0.10; '0.0,': 0.16; '1000):': 0.16; 'dist': 0.16; 'idx': 0.16; 'wed,': 0.16; 'wrote:': 0.17; '<': 0.17; 'variable': 0.20; 'email addr:gmail.com>': 0.20; 'skip:" 30': 0.20; 'assignment': 0.22; 'received:74.125.82.174': 0.23; 'cc:2**0': 0.23; 'cc:addr:python.org': 0.25; 'header:In-Reply- To:1': 0.25; '(most': 0.27; 'am,': 0.27; 'message- id:@mail.gmail.com': 0.27; 'run': 0.28; 'url:mailman': 0.29; 'points': 0.29; 'skip:& 10': 0.29; 'error': 0.30; 'code': 0.31; 'point': 0.31; 'url:python': 0.32; 'file': 0.32; 'print': 0.32; 'url:listinfo': 0.32; 'getting': 0.33; 'received:74.125.82': 0.33; 'traceback': 0.33; 'true.': 0.33; 'received:google.com': 0.34; 'false': 0.35; 'nov': 0.35; 'continue': 0.35; 'received:74.125': 0.36; 'url:org': 0.36; "wasn't": 0.36; 'test': 0.36; 'skip:p 20': 0.36; 'unable': 0.36; 'why': 0.37; 'subject:: ': 0.38; 'header:Received:5': 0.40; 'url:mail': 0.40; 'your': 0.60; 'skip:u 10': 0.60; 'skip:\xc2 10': 0.62; '8bit%:100': 0.70; '74,': 0.91; 'joel': 0.91; 'to:none': 0.93 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:cc :content-type; bh=jlMtEb759Gqd2ymuxrK9v8NKRPCOGanxgb/vryhcR5M=; b=d0Zb8P7V3+5NV7JQuCB0e6i5ad9beiNt9eAe6BhePwm/ArC4kHdSeGHQbWYW8Qzbdq ga06jc6nefJMVu7huNn4UERJ/2NBqFgj76gxXKly1EuuvgsWTA37BOUOGNi7V8L1t3j7 L+jZxAIwfZupRu9unk9DfT+iCsJii7u+4MUXTIsCZ/+0d4o0tyLVY88QA+B7/A+xRqC9 9Dpf3M9tmU0Sd3NYNI3dqvdOh+5JsjMUxgrpZO7G3niqJ/MinxKufQuzErvBshpF81lm BL78TyHacDLAJRzT3HyL2xdgM7LETPlxKNdrpJ2GDZmH6KSTpK89YYBA5scyBBfNG+U3 p2Cg== MIME-Version: 1.0 In-Reply-To: References: Date: Wed, 14 Nov 2012 11:02:34 -0500 Subject: Re: Error From: Joel Goldstick Cc: "python-list@python.org" Content-Type: multipart/alternative; boundary=f46d0444ec31acf30a04ce76a91a X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 135 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1352908956 news.xs4all.nl 6959 [2001:888:2000:d::a6]:55899 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:33343 --f46d0444ec31acf30a04ce76a91a Content-Type: text/plain; charset=UTF-8 On Wed, Nov 14, 2012 at 10:18 AM, inshu chauhan wrote: > > for this code m getting this error : > > CODE : > def ComputeClasses(data): > radius = .5 > points = [] > for cy in xrange(0, data.height): > for cx in xrange(0, data.width): > if data[cy,cx] != (0.0,0.0,0.0): > This code is only run if the test above is true > centre = data[cy, cx] > points.append(centre) > > > change = True > > while change: > > for ring_number in xrange(1, 1000): > change = False > new_indices = GenerateRing(cx, cy, ring_number) > > > for idx in new_indices: > point = data[idx[0], idx[1]] > > if point == (0.0, 0.0, 0.0 ): > continue > else: > dist = distance(centre, point) > centre is only set if the test above is true. In your run, it apparently wasn't > if dist < radius : > print point > points.append(point) > change = True > print change > > > break > > > ERROR : > Traceback (most recent call last): > File "Z:\modules\classification2.py", line 74, in > ComputeClasses(data) > File "Z:\modules\classification2.py", line 56, in ComputeClasses > dist = distance(centre, point) > UnboundLocalError: local variable 'centre' referenced before assignment > > And i am unable to understand .. WHY ? > > > > -- > http://mail.python.org/mailman/listinfo/python-list > > -- Joel Goldstick --f46d0444ec31acf30a04ce76a91a Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: base64 PGJyPjxkaXYgY2xhc3M9ImdtYWlsX2V4dHJhIj48YnI+PGJyPjxkaXYgY2xhc3M9ImdtYWlsX3F1 b3RlIj5PbiBXZWQsIE5vdiAxNCwgMjAxMiBhdCAxMDoxOCBBTSwgaW5zaHUgY2hhdWhhbiA8c3Bh biBkaXI9Imx0ciI+Jmx0OzxhIGhyZWY9Im1haWx0bzppbnNpZGVzaG9lc0BnbWFpbC5jb20iIHRh cmdldD0iX2JsYW5rIj5pbnNpZGVzaG9lc0BnbWFpbC5jb208L2E+Jmd0Ozwvc3Bhbj4gd3JvdGU6 PGJyPgo8YmxvY2txdW90ZSBjbGFzcz0iZ21haWxfcXVvdGUiIHN0eWxlPSJtYXJnaW46MCAwIDAg LjhleDtib3JkZXItbGVmdDoxcHggI2NjYyBzb2xpZDtwYWRkaW5nLWxlZnQ6MWV4Ij48YnI+Zm9y IHRoaXMgY29kZSBtIGdldHRpbmcgdGhpcyBlcnJvciA6PGJyPjxicj5DT0RFIDogPGJyPmRlZiBD b21wdXRlQ2xhc3NlcyhkYXRhKTo8YnI+wqDCoMKgIHJhZGl1cyA9IC41IDxicj7CoMKgwqAgcG9p bnRzID0gW108YnI+CsKgwqDCoCBmb3IgY3kgaW4geHJhbmdlKDAsIGRhdGEuaGVpZ2h0KTo8YnI+ wqDCoMKgwqDCoMKgwqAgZm9yIGN4IGluIHhyYW5nZSgwLCBkYXRhLndpZHRoKTo8YnI+wqDCoMKg wqDCoMKgwqDCoMKgwqDCoCBpZiBkYXRhW2N5LGN4XSAhPSAoMC4wLDAuMCwwLjApOjxicj48L2Js b2NrcXVvdGU+PGRpdj5UaGlzIGNvZGUgaXMgb25seSBydW4gaWYgdGhlIHRlc3QgYWJvdmUgaXMg dHJ1ZSA8YnI+PC9kaXY+PGJsb2NrcXVvdGUgY2xhc3M9ImdtYWlsX3F1b3RlIiBzdHlsZT0ibWFy Z2luOjAgMCAwIC44ZXg7Ym9yZGVyLWxlZnQ6MXB4ICNjY2Mgc29saWQ7cGFkZGluZy1sZWZ0OjFl eCI+CgrCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgY2VudHJlID0gZGF0YVtjeSwgY3hd PGJyPsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBwb2ludHMuYXBwZW5kKGNlbnRyZSnC oMKgwqAgPGJyPsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCA8YnI+PGJyPsKgwqDCoMKg wqDCoMKgwqDCoMKgwqAgY2hhbmdlID0gVHJ1ZTxicj48YnI+wqDCoMKgwqDCoMKgwqDCoMKgwqDC oCB3aGlsZSBjaGFuZ2U6PGJyPsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCA8YnI+wqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIGZvciByaW5nX251bWJlciBpbiB4cmFuZ2UoMSwg MTAwMCk6PGJyPgoKwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgY2hhbmdl ID0gRmFsc2U8YnI+wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgbmV3X2lu ZGljZXMgPSBHZW5lcmF0ZVJpbmcoY3gsIGN5LCByaW5nX251bWJlcik8YnI+wqDCoMKgwqDCoMKg wqDCoMKgwqAgPGJyPjxicj7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBm b3IgaWR4IGluIG5ld19pbmRpY2VzOjxicj7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgIHBvaW50ID0gZGF0YVtpZHhbMF0sIGlkeFsxXV08YnI+CgrCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgPGJyPsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgaWYgcG9pbnQgPT0gKDAuMCwgMC4wLCAwLjAgKTo8YnI+ wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgY29udGlu dWU8YnI+wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBlbHNl Ojxicj7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqAgZGlzdCA9IGRpc3RhbmNlKGNlbnRyZSwgcG9pbnQpPGJyPjwvYmxvY2txdW90ZT4KPGRpdj5j ZW50cmUgaXMgb25seSBzZXQgaWYgdGhlIHRlc3QgYWJvdmUgaXMgdHJ1ZS7CoCBJbiB5b3VyIHJ1 biwgaXQgYXBwYXJlbnRseSB3YXNuJiMzOTt0IDxicj48L2Rpdj48YmxvY2txdW90ZSBjbGFzcz0i Z21haWxfcXVvdGUiIHN0eWxlPSJtYXJnaW46MCAwIDAgLjhleDtib3JkZXItbGVmdDoxcHggI2Nj YyBzb2xpZDtwYWRkaW5nLWxlZnQ6MWV4Ij7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgaWbCoCBkaXN0ICZsdDsgcmFkaXVzIDo8YnI+CgrCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oCBwcmludCBwb2ludCA8YnI+wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgcG9pbnRzLmFwcGVuZChwb2ludCk8YnI+wqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgY2hh bmdlID0gVHJ1ZTxicj7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoCBwcmludCBjaGFuZ2U8YnI+wqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoCA8YnI+CgrCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgPGJyPsKg wqDCoMKgwqDCoMKgwqDCoMKgwqAgYnJlYWsgPGJyPjxicj48YnI+RVJST1IgOiA8YnI+VHJhY2Vi YWNrIChtb3N0IHJlY2VudCBjYWxsIGxhc3QpOjxicj7CoCBGaWxlICZxdW90O1o6XG1vZHVsZXNc Y2xhc3NpZmljYXRpb24yLnB5JnF1b3Q7LCBsaW5lIDc0LCBpbiAmbHQ7bW9kdWxlJmd0Ozxicj7C oMKgwqAgQ29tcHV0ZUNsYXNzZXMoZGF0YSk8YnI+wqAgRmlsZSAmcXVvdDtaOlxtb2R1bGVzXGNs YXNzaWZpY2F0aW9uMi5weSZxdW90OywgbGluZSA1NiwgaW4gQ29tcHV0ZUNsYXNzZXM8YnI+CgrC oMKgwqAgZGlzdCA9IGRpc3RhbmNlKGNlbnRyZSwgcG9pbnQpPGJyPlVuYm91bmRMb2NhbEVycm9y OiBsb2NhbCB2YXJpYWJsZSAmIzM5O2NlbnRyZSYjMzk7IHJlZmVyZW5jZWQgYmVmb3JlIGFzc2ln bm1lbnQ8YnI+PGJyPkFuZCBpIGFtIHVuYWJsZSB0byB1bmRlcnN0YW5kIC4uIFdIWSA/PGJyPjxi cj48YnI+Cjxicj4tLTxicj4KPGEgaHJlZj0iaHR0cDovL21haWwucHl0aG9uLm9yZy9tYWlsbWFu L2xpc3RpbmZvL3B5dGhvbi1saXN0IiB0YXJnZXQ9Il9ibGFuayI+aHR0cDovL21haWwucHl0aG9u Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3B5dGhvbi1saXN0PC9hPjxicj4KPGJyPjwvYmxvY2txdW90 ZT48L2Rpdj48YnI+PGJyIGNsZWFyPSJhbGwiPjxicj4tLSA8YnI+Sm9lbCBHb2xkc3RpY2s8YnI+ PGJyPgo8L2Rpdj4K --f46d0444ec31acf30a04ce76a91a--