I have this snippet of code:
import PySide.QtGui
app = PySide.QtGui.QApplication('')
wnd = PySide.QtGui.QWidget()
mly = PySide.QtGui.QVBoxLayout()
combo = PySide.QtGui.QComboBox()
table = [ ('Lorem','ipsum','dolor','sit','amet'),
('Aliquam','sodales','nunc','eget','lorem'),
('Vivamus','et','sapien','mattis','vulputate'),
('Integer','ac','dolor','commodo','cursus'),
('Sed','sed','erat','non','magna'),
('Duis','vestibulum','eu','tortor','euismod') ]
combo.clear()
for (one,two,three,four,five) in table:
combo.addItem('%-12s | %-12s | %-12s | %-12s | %-12s' % (one,two,three,four,five))
mly.addWidget(combo)
mly.addStretch(1)
wnd.setLayout(mly)
wnd.show()
app.exec_()
I have obtained this (1) and I'm looking for something like (2): all columns tabulated.
The combobox have the standard proportional font (MS Shell Dlg 2 from QtDesigner). I don't want to use monospaced font.
I have tried to calculate the maximum width in pixels of every column with combo.fontMetrics().boundingRect(text).width() and fill every column with spaces:
borde = ' '
unspc = ' '
maxwdt = {0:0, 1:0, 2:0, 3:0, 4:0}
for lstlin in table:
for (ndx,val) in enumerate(lstlin):
unwdt = combo.fontMetrics().boundingRect(borde + val + borde).width()
if (unwdt > maxwdt[ndx]):
maxwdt[ndx] = unwdt
combo.clear()
for lstlin in table:
txtlin = ''
for (ndx,val) in enumerate(lstlin):
txtcmp = borde + val + borde
while (combo.fontMetrics().boundingRect(txtcmp).width() < maxwdt[ndx]):
txtcmp += unspc
txtlin += txtcmp + '|'
combo.addItem(txtlin)
and I have obtained (3).
There are any other method to format a text with proportional font for use in a QComboBox?. Thanks.
Your algorithm is fine, but it can only be as accurate as the width of a standard space in the proportional font you are using.
To get more accurate results, use the thinnest possible whitespace character available. For fonts with good unicode support, this will be the HAIR SPACE U+200A.
On Linux (using the DejaVu Sans font) I can exactly reproduce (3) by changing the following two lines in your example script:
# hair-space
unspc = '\u200a'
borde = unspc * 10
Related
I have problem with the syntax in the last part of steg program. I tried to convert python 2 version (of the working code) to python 3, and this is the last part of it:
flag = base64.b64decode("".join(chars)) <- error
print(flag)
The program 1. encrypts the message in the Last Significiant Bits of the image as saves it as a new image. Then 2.decrypts the message, which is stored in "flag", and prints it.
* can the error be caused by the wrong type of input?:
message = input("Your message: ")
BELOW: UNHIDING PROGRAM
#coding: utf-8
import base64
from PIL import Image
image = Image.open("after.png")
extracted = ''
pixels = image.load()
#Iterating in 1st row
for x in range(0,image.width):
r,g,b = pixels[x,0]
# Storing LSB of each color
extracted += bin(r)[-1]
extracted += bin(g)[-1]
extracted += bin(b)[-1]
chars = []
for i in range(len(extracted)/8):
byte = extracted[i*8:(i+1)*8]
chars.append(chr(int(''.join([str(bit) for bit in byte]), 2)))
flag = base64.b64decode(''.join(chars))
print flag
BELOW: HIDING PROGRAM:
import bitarray
import base64
from PIL import Image
with Image.open('before.png') as im:
pixels=im.load()
message = input("Your message: ")
encoded_message = base64.b64encode(message.encode('utf-8'))
#Convert the message into an array of bits
ba = bitarray.bitarray()
ba.frombytes(encoded_message)
bit_array = [int(i) for i in ba]
#Duplicate the original picture
im = Image.open("before.png")
im.save("after.png")
im = Image.open("after.png")
width, height = im.size
pixels = im.load()
#Hide message in the first row
i = 0
for x in range(0,width):
r,g,b = pixels[x,0]
#print("[+] Pixel : [%d,%d]"%(x,0))
#print("[+] \tBefore : (%d,%d,%d)"%(r,g,b))
#Default values in case no bit has to be modified
new_bit_red_pixel = 255
new_bit_green_pixel = 255
new_bit_blue_pixel = 255
if i<len(bit_array):
#Red pixel
r_bit = bin(r)
r_last_bit = int(r_bit[-1])
r_new_last_bit = r_last_bit & bit_array[i]
new_bit_red_pixel = int(r_bit[:-1]+str(r_new_last_bit),2)
i += 1
if i<len(bit_array):
#Green pixel
g_bit = bin(g)
g_last_bit = int(g_bit[-1])
g_new_last_bit = g_last_bit & bit_array[i]
new_bit_green_pixel = int(g_bit[:-1]+str(g_new_last_bit),2)
i += 1
if i<len(bit_array):
#Blue pixel
b_bit = bin(b)
b_last_bit = int(b_bit[-1])
b_new_last_bit = b_last_bit & bit_array[i]
new_bit_blue_pixel = int(b_bit[:-1]+str(b_new_last_bit),2)
i += 1
pixels[x,0] = (new_bit_red_pixel,new_bit_green_pixel,new_bit_blue_pixel)
#print("[+] \tAfter: (%d,%d,%d)"%(new_bit_red_pixel,new_bit_green_pixel,new_bit_blue_pixel))
im.save('after.png')
error
ValueError: string argument should contain only ASCII characters
help for base64.b64decode says:
b64decode(s, altchars=None, validate=False)
Decode the Base64 encoded bytes-like object or ASCII string s.
...
Considering that in Python 2 there were "normal" strs and unicode-strs (u-prefixed), I suggest taking closer look at what produce "".join(chars). Does it contain solely ASCII characters?
I suggest adding:
print("Codes:",[ord(c) for c in chars])
directly before:
flag = base64.b64decode("".join(chars))
If there will be number >127 inside codes, that mean it might not work as it is fit only for pure ASCII strs.
I have 6 subplots that need 2 dynamic title components and I can code for 1 but I'm not sure how to change my code below to add a 2nd dynamic title component on the same line after searching the literature. Here is my for loop to generate the 6 subplots with the "plt.title.." line below:
list = [0,1,2,3,4,5]
now = datetime.datetime.now()
currm = now.month
import calendar
fig, ax = plt.subplots(6)
for x in list:
dam = DS.where(DS['time.year']==rmax.iloc[x,1]).groupby('time.month').mean()#iterate by index of
column "1" or the years
dam = dam.sel(month=3)#current month mean 500
dam = dam.sel(level=500)
damc = dam.to_array()
lats = damc['lat'].data
lons = damc['lon'].data
#plot data
ax = plt.axes(projection=ccrs.PlateCarree())
ax.coastlines(lw=1)
damc = damc.squeeze()
cnplot = plt.contour(lons,lats,damc,cmap='jet')
plt.title('Mean 500mb Hgt + Phase {} 2020'.format(calendar.month_name[currm-1]))
plt.show()
#plt.clf()
I need to add one of each from this list in the loop to the "plt.title.." between the "+" and the word "Phase" line above...?
tindices = ['SOI','AO','NAO','PNA','EPO','PDO']
Thank you for any help with this!
Try accessing the tindices one by one and passing them to the title
plt.title('Mean 500mb Hgt + {} Phase {} 2020'.format(tindices[x],
calendar.month_name[currm-1]))
Data
Model Decreasing-err Constant-err Increasing-err
2025 73-78 80-85 87-92
2035 63-68 80-85 97-107
2050 42-57 75-90 104.5-119.5
which data-structure (use of -err) described here.
To plot the points, I run
set terminal qt size 560,270;
set grid; set offset 1,1,0,0;
set datafile separator " -";
set key autotitle columnhead;
plot for [i=2:6:2] "data.dat" using 1:(0.5*(column(i)+column(i+1))):(0.5*(column(i+1)-column(i))) with yerror;
and get
However, I would like to add a line fits to these points which you cannot do just with with yerrorlines because of kinks.
My pseudocode for fitting the increasing and decreasing lines
inc(x) = k1*x + k2;
con(x) = n1*x + n2;
dec(x) = m1*x + m2;
fit inc(x), con(x) dec(x) for [i=2:6:2] "data.dat"
using 1:(0.5*(column(i)+column(i+1))):(0.5*(column(i+1)-column(i)))
via k1,k2,n1,n2,m1,m2;
where the problem is in using the function fit with for loop.
How can you use Gnuplot's fit in a for loop?
I would like to fit many lines at the same time to the data.
I would use do in conjunction with eval to do this:
# Define your functions (you can also use do + eval to do this)
f1(x) = a1*x+b1
f2(x) = a2*x+b2
f3(x) = a3*x+b3
# Loop
do for [i=1:3] {
eval sprintf("fit f%g(x) 'data.dat' u 0:%g via a%g, b%g", i, i, i, i)
}
You can adapt the above to your own purposes.
I have a text file that contains a number of lines that starts with "# Control Point No"
I managed to get an output of only these lines by doing
grep '# Control Point No'
Now I want only to keep the last word of all these line.
The lines look like
"# Control Point No 39217: 1.52520046527084"
So I want to output only the last numbers as 1.52520046527084
and then:
-find lowest value
-find highest value
-calculate average value
All this I want to do is not all included in the post title, sorry
Thanks
Python is your friend:
#!/usr/bin/python
import re, fileinput, sys
numlines = 0
lowest = sys.float_info.max
highest = sys.float_info.min
total = 0.0
for line in fileinput.input():
m = re.match(r'# Control Point No (\d+): (.+)', line)
if m:
value = float(m.group(2))
numlines += 1
if value < lowest:
lowest = value
if value > highest:
highest = value
total += value
print "lowest=", lowest, ", highest=", highest, ", average=", (total / numlines)
$ chmod 0755 procdata.py
$ ./procdata.py < testdata
lowest= 1.0 , highest= 67.9 , average= 7.31550797863
I'm trying to use the openedge jdbc connector to pull data from an existing progress db but im running into column width issues.
Here is the error that is holding me up.
[DataDirect][OpenEdge JDBC Driver][OpenEdge] Column TabDisplayName in table PUB.Menu has value exceeding its max length or precision.
I've looked at many posts, each offering different advice, and here's what I've given a go this far:
Manually modify the SQL width via the data dictionary.
I ran a quick check on PUB.Menu.TabDisplayName to find a max value of 44 Characters
Set the width to x(50) to no avail and then x(100) out of a fix of irrational rage, again with no luck.
Use the SUBSTR() SQL Function to truncate the field -not optimum but better than nothing
I get weird results with this. It works fine in sqlexp but in a java environment its like the column is never selected.
Use the dbtool to automatically fix width problems with option #2
After selecting all tables and "areas" (not sure what those are...) and submitting the final option I am returned to the proenv cmdline as if nothing ever happened.
Modify the sql width programmatically via 4gl
This is the only option I found that I have yet to try.
I am a little reluctant to try this only because a manual modification failed. Also this is a live development environment(for me only) and Im trying to mess it up too terribly, although i am taking snaps regularly.
Running progress 10.2B on a unix machine.
Any comments and suggestions would be appreciated.
-Thanks
The dbtool option is the best. It is designed for this. From proenv you should see something like this:
proenv> dbtool s2k
DATABASE TOOLS MENU - 10.2B
---------------------------
1. SQL Width & Date Scan w/Report Option
2. SQL Width Scan w/Fix Option
3. Record Validation
4. Record Version Validation
5. Read or Validate Database Block(s)
6. Record Fixup
7. Schema Validation
9. Enable/Disable File Logging
Q. Quit
Choice: 2
: (0=single-user 1=self-service >1=#threads)? 1
Padding % above current max: 100
: (Table number or all)? all
: (Area number or all)? all
: (verbose level 0-3)? 0
Total records read: 31357
SQLWidth errors found: 0, Date errors found: 0
SQLWidth errors fixed: 0
If your db has a server up & running choose "1" at the connect: prompt. If not, choose "0".
Pick 100 for padding to double the width of fields.
Try it on a copy of the "sports" database if you are unsure. Use a higher level of verboseness if you want some insight into what it is doing.
It does not take very long to run on a small development database. (It is basically instantaneous on "sports".)
It is possible to create views with substring (field.name,1,maxlength) option and use PUB2.viewname instead pub.tablename
DROP VIEW PUB2."accounts";
CREATE VIEW PUB2."accounts" (
"ACC-TYPE",
"ACCOUNT-NAME",
ANALITIC,
ARCH,
COUNT1,
CURRENCY,
PLAN,
QUANTITY,
"RID-ANOBJECT",
"RID-APP",
TRANSIT )
AS select "acc-type",
SUBSTRING("account-name", 1, 130),
"analitic",
"arch",
"count1",
"currency",
"plan",
"quantity",
"rid-anobject",
"rid-app",
"transit"
FROM PUB."accounts";
COMMIT;
use sqlexp for automatic creation:
sqlexp account -H localhost -S ' + db-port + ' -user sysprogress -password sysprogress -infile recreateSQLviews.sql -outfile recreateSQLviews.log
here is code:
def var num-port as integer.
for first _Servers where _Servers._Server-Type = "Login" no-lock:
num-port = _Servers._Server-PortNum.
end.
if num-port < 0 then num-port = num-port + 65536.
if num-port = 0 then do:
message "Define -S parameter for Database" view-as alert-box.
RETURN.
end.
message num-port.
/* ttSQLWidth table: SQL WIDTH for all tables */
def var execstr as char.
def var rez-str as char.
def var db-port as char. /* -S port */
db-port = STRING(num-port).
DEFINE TEMP-TABLE ttSQLWidth NO-UNDO
FIELD tableName AS CHARACTER
FIELD tableNum AS INTEGER
FIELD fieldName AS CHARACTER
FIELD sqlWidth AS INTEGER
FIELD requireFix AS LOGICAL INIT FALSE
FIELD actualWidth AS INTEGER
FIELD newWidth AS INTEGER
INDEX tableNum tableNum
INDEX tableName tableName.
FOR EACH _File NO-LOCK WHERE _Tbl-Type = "T":
FOR EACH _Field OF _File WHERE _Field._Data-type = "character":
if _field._extent > 0 then next.
CREATE ttSQLWidth.
ASSIGN tableName = _File._File-name
tableNum = _File._File-num
fieldName = _Field._Field-name
sqlWidth = _Field._Width.
RELEASE ttSQLWidth.
END. /* FOR EACH _Field */
END. /* FOR EACH _File */
DEFINE VARIABLE bTab AS HANDLE NO-UNDO.
DEFINE VARIABLE hQuery AS HANDLE NO-UNDO.
DEFINE VARIABLE queryString AS CHARACTER NO-UNDO.
FOR EACH ttSQLWidth:
CREATE BUFFER bTab FOR TABLE tableName.
CREATE QUERY hQuery.
hQuery:ADD-BUFFER(bTab).
message tablename.
queryString = "FOR EACH " + tableName + " WHERE LENGTH(" + fieldName + ") >= " + STRING(sqlWidth) + " BY LENGTH(" + fieldName + ") DESC".
hQuery:QUERY-PREPARE(queryString).
hQuery:QUERY-OPEN().
IF hQuery:GET-NEXT() THEN DO:
ASSIGN actualWidth = LENGTH(bTab:BUFFER-FIELD(fieldName):BUFFER-VALUE)
requireFix = TRUE.
END. /* IF .. THEN DO */
hQuery:QUERY-CLOSE.
DELETE OBJECT hQuery.
bTab:BUFFER-RELEASE().
DELETE OBJECT bTab.
END. /* FOR EACH ttSQLWidth */
def var add-pr as integer initial 10. /* % from max */
def var maxWidth as integer initial 249. /* maxwidth */
FOR EACH ttSQLWidth WHERE ttSQLWidth.requireFix = TRUE:
ttSQLWidth.newWidth = TRUNCATE ( (ttSQLWidth.actualWidth + add-pr) / add-pr, 0 ) * add-pr.
ttSQLWidth.newWidth = INTEGER( ttSQLWidth.newWidth).
if ttSQLWidth.newWidth > maxWidth then ttSQLWidth.newWidth = maxWidth.
END.
/* sql script generation */
OUTPUT TO value("recreateSQLviews.sql").
def var lst-field as char.
FOR EACH ttSQLWidth WHERE BREAK BY ttSQLWidth.tableName:
IF FIRST-OF(ttSQLWidth.tableName)
THEN run MakeSQLViews(ttSQLWidth.tableName).
END.
OUTPUT CLOSE.
/* sql script execution */
execstr = 'sqlexp account -H localhost -S ' + db-port + ' -user sysprogress -password sysprogress -infile recreateSQLviews.sql -outfile recreateSQLviews.log'.
input through value(execstr).
repeat:
IMPORT UNFORMAT rez-str.
message rez-str.
end.
INPUT CLOSE.
RETURN.
PROCEDURE MakeSQLViews:
define input parameter tableName as character.
def var str_tmp as char.
def var str_tmp1 as char.
def var str as char initial "count,sum,double,row,date,level,area,number,primary".
def var fieldName as char.
def var fieldName1 as char.
FOR EACH _file WHERE _file._file-name = tableName AND
_file._file-num GT 0 AND _file._file-num LT 32000 NO-LOCK:
fieldName = "".
FOR EACH _Field OF _File NO-LOCK:
str_tmp = '"' + _Field._Field-name + '"'.
FOR FIRST ttSQLWidth where ttSQLWidth.tableName = _file._file-name and
ttSQLWidth.fieldName = _Field._Field-name and
ttSQLWidth.requireFix = TRUE:
str_tmp = 'SUBSTRING("' + _Field._Field-name + '", 1, ' + STRING(ttSQLWidth.newWidth) + ')'.
END.
fieldName = fieldName + (IF(fieldName = "") THEN ("") ELSE ("," + chr(10) + chr(9))) + str_tmp.
str_tmp1 = ( IF ( INDEX ( _Field._Field-name, "-" ) = 0 )
THEN ( _Field._Field-name )
ELSE ( '"' + _Field._Field-name + '"' )).
if LOOKUP ( _Field._Field-name, str, "," ) > 0 then str_tmp1 = '"' + _Field._Field-name + '"'.
fieldName1 = fieldName1 + (IF(fieldName1 = "") THEN ("") ELSE ("," + chr(10) + chr(9))) + UPPER(str_tmp1).
END. /* FOR EACH _Field */
PUT UNFORMATTED 'DROP VIEW PUB2."' + _file._file-name + '";' SKIP.
PUT UNFORMATTED 'CREATE VIEW PUB2."' + _file._file-name + '" ( ' + chr(10) chr(9) + fieldName1 + ' ) ' + chr(10) +
'AS select ' + fieldName + chr(10) +
'FROM PUB."' + _file._file-name + '";' SKIP.
PUT UNFORMATTED 'COMMIT;' SKIP(1).
END.
END.