class QTime¶

The QTime class provides clock time functions. More…

Synopsis¶

Methods¶

def __init__()
def __reduce__()
def __repr__()
def addMSecs()
def addSecs()
def hour()
def isNull()
def isValid()
def minute()
def msec()
def msecsSinceStartOfDay()
def msecsTo()
def __ne__()
def __lt__()
def __le__()
def __eq__()
def __gt__()
def __ge__()
def second()
def secsTo()
def setHMS()
def toPython()
def toString()

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

Detailed Description¶

A QTime object contains a clock time, which it can express as the numbers of hours, minutes, seconds, and milliseconds since midnight. It provides functions for comparing times and for manipulating a time by adding a number of milliseconds. QTime objects should be passed by value rather than by reference to const; they simply package int.

QTime uses the 24-hour clock format; it has no concept of AM/PM. Unlike QDateTime , QTime knows nothing about time zones or daylight-saving time (DST).

A QTime object is typically created either by giving the number of hours, minutes, seconds, and milliseconds explicitly, or by using the static function currentTime() , which creates a QTime object that represents the system’s local time.

The hour() , minute() , second() , and msec() functions provide access to the number of hours, minutes, seconds, and milliseconds of the time. The same information is provided in textual format by the toString() function.

The addSecs() and addMSecs() functions provide the time a given number of seconds or milliseconds later than a given time. Correspondingly, the number of seconds or milliseconds between two times can be found using secsTo() or msecsTo() .

QTime provides a full set of operators to compare two QTime objects; an earlier time is considered smaller than a later one; if A. msecsTo (B) is positive, then A < B.

QTime objects can also be created from a text representation using fromString() and converted to a string representation using toString() . All conversion to and from string formats is done using the C locale. For localized conversions, see QLocale .

See also

QDate QDateTime

class TimeFlag¶

__init__()¶

Constructs a null time object. For a null time, isNull() returns true and isValid() returns false. If you need a zero time, use QTime (0, 0). For the start of a day, see startOfDay() .

See also

isNull() isValid()

__init__(h, m[, s=0[, ms=0]])

Parameters:

h – int
m – int
s – int
ms – int

Constructs a time with hour h, minute m, seconds s and milliseconds ms.

h must be in the range 0 to 23, m and s must be in the range 0 to 59, and ms must be in the range 0 to 999.

See also

isValid()

__reduce__()¶

Return type:: str

__repr__()¶

Return type:: str

addMSecs(ms)¶

Parameters:: ms – int
Return type:: QTime

Returns a QTime object containing a time ms milliseconds later than the time of this object (or earlier if ms is negative).

Note that the time will wrap if it passes midnight. See addSecs() for an example.

Returns a null time if this time is invalid.

See also

addSecs() msecsTo() addMSecs()

addSecs(secs)¶

Parameters:: secs – int
Return type:: QTime

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

Returns a QTime object containing a time s seconds later than the time of this object (or earlier if s is negative).

Note that the time will wrap if it passes midnight.

Returns a null time if this time is invalid.

Example:

QTime n(14, 0, 0) # n == 14:00:00
t = QTime()
t = n.addSecs(70) # t == 14:01:10
t = n.addSecs(-70) # t == 13:58:50
t = n.addSecs(10 * 60 * 60 + 5) # t == 00:00:05
t = n.addSecs(-15 * 60 * 60) # t == 23:00:00

See also

addMSecs() secsTo() addSecs()

static currentTime()¶

Return type:: QTime

Returns the current time as reported by the system clock.

Note that the accuracy depends on the accuracy of the underlying operating system; not all systems provide 1-millisecond accuracy.

Furthermore, currentTime() only increases within each day; it shall drop by 24 hours each time midnight passes; and, beside this, changes in it may not correspond to elapsed time, if a daylight-saving transition intervenes.

See also

currentDateTime() currentDateTimeUtc()

static fromMSecsSinceStartOfDay(msecs)¶

Parameters:: msecs – int
Return type:: QTime

Returns a new QTime instance with the time set to the number of msecs since the start of the day, i.e. since 00:00:00.

If msecs falls outside the valid range an invalid QTime will be returned.

See also

msecsSinceStartOfDay()

static fromString(string, format)¶

Parameters:

string – str
format – str

Return type:

QTime

This is an overloaded function.

static fromString(string[, format=Qt.TextDate])

Parameters:

string – str
format – DateFormat

Return type:

QTime

This is an overloaded function.

static fromString(string, format)

Parameters:

string – str
format – str

Return type:

QTime

This is an overloaded function.

static fromString(string[, format=Qt.TextDate])

Parameters:

string – str
format – DateFormat

Return type:

QTime

Returns the time represented in the string as a QTime using the format given, or an invalid time if this is not possible.

See also

toString() toTime()

static fromString(string, format)

Parameters:

string – str
format – str

Return type:

QTime

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

Returns the QTime represented by the string, using the format given, or an invalid time if the string cannot be parsed.

These expressions may be used for the format:

Expression

Output

h

The hour without a leading zero (0 to 23 or 1 to 12 if AM/PM display)

hh

The hour with a leading zero (00 to 23 or 01 to 12 if AM/PM display)

H

The hour without a leading zero (0 to 23, even with AM/PM display)

HH

The hour with a leading zero (00 to 23, even with AM/PM display)

m

The minute without a leading zero (0 to 59)

mm

The minute with a leading zero (00 to 59)

s

The whole second, without any leading zero (0 to 59)

ss

The whole second, with a leading zero where applicable (00 to 59)

z or zz

The fractional part of the second, as would usually follow a decimal point, without requiring trailing zeroes (0 to 999). Thus "s.z" matches the seconds with up to three digits of fractional part supplying millisecond precision, without needing trailing zeroes. For example, "s.z" would recognize either "00.250" or "0.25" as representing a time a quarter second into its minute.

zzz

Three digit fractional part of the second, to millisecond precision, including trailing zeroes where applicable (000 to 999). For example, "ss.zzz" would reject "0.25" but recognize "00.250" as representing a time a quarter second into its minute.

AP, A, ap, a, aP or Ap

Either ‘AM’ indicating a time before 12:00 or ‘PM’ for later times, matched case-insensitively.

Expression	Output
h	The hour without a leading zero (0 to 23 or 1 to 12 if AM/PM display)
hh	The hour with a leading zero (00 to 23 or 01 to 12 if AM/PM display)
H	The hour without a leading zero (0 to 23, even with AM/PM display)
HH	The hour with a leading zero (00 to 23, even with AM/PM display)
m	The minute without a leading zero (0 to 59)
mm	The minute with a leading zero (00 to 59)
s	The whole second, without any leading zero (0 to 59)
ss	The whole second, with a leading zero where applicable (00 to 59)
z or zz	The fractional part of the second, as would usually follow a decimal point, without requiring trailing zeroes (0 to 999). Thus `"s.z"` matches the seconds with up to three digits of fractional part supplying millisecond precision, without needing trailing zeroes. For example, `"s.z"` would recognize either `"00.250"` or `"0.25"` as representing a time a quarter second into its minute.
zzz	Three digit fractional part of the second, to millisecond precision, including trailing zeroes where applicable (000 to 999). For example, `"ss.zzz"` would reject `"0.25"` but recognize `"00.250"` as representing a time a quarter second into its minute.
AP, A, ap, a, aP or Ap	Either ‘AM’ indicating a time before 12:00 or ‘PM’ for later times, matched case-insensitively.

All other input characters will be treated as text. Any non-empty sequence of characters enclosed in single quotes will also be treated (stripped of the quotes) as text and not be interpreted as expressions.

time = QTime.fromString("1mm12car00", "m'mm'hcarss")
# time is 12:01.00

If the format is not satisfied, an invalid QTime is returned. Expressions that do not expect leading zeroes to be given (h, m, s and z) are greedy. This means that they will use two digits (or three, for z) even if this puts them outside the range of accepted values and leaves too few digits for other sections. For example, the following string could have meant 00:07:10, but the m will grab two digits, resulting in an invalid time:

time = QTime.fromString("00:710", "hh:ms") # invalid()

Any field that is not represented in the format will be set to zero. For example:

time = QTime.fromString("1.30", "m.s")
# time is 00:01:30.000

Note

If localized forms of am or pm (the AP, ap, Ap, aP, A or a formats) are to be recognized, use system() .toTime().

Note

If a format character is repeated more times than the longest expression in the table above using it, this part of the format will be read as several expressions with no separator between them; the longest above, possibly repeated as many times as there are copies of it, ending with a residue that may be a shorter expression. Thus 'HHHHH' would match "08088" or "080808" and set the hour to 8; if the time string contained “070809” it would “match” but produce an inconsistent result, leading to an invalid time.

hour()¶

Return type:: int

Returns the hour part (0 to 23) of the time.

Returns -1 if the time is invalid.

See also

minute() second() msec()

isNull()¶

Return type:: bool

Returns true if the time is null (i.e., the QTime object was constructed using the default constructor); otherwise returns false. A null time is also an invalid time.

See also

isValid()

isValid()¶

Return type:: bool

Returns true if the time is valid; otherwise returns false. For example, the time 23:30:55.746 is valid, but 24:12:30 is invalid.

See also

isNull()

static isValid(h, m, s[, ms=0])

Parameters:

h – int
m – int
s – int
ms – int

Return type:

bool

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

This is an overloaded function.

Returns true if the specified time is valid; otherwise returns false.

The time is valid if h is in the range 0 to 23, m and s are in the range 0 to 59, and ms is in the range 0 to 999.

Example:

QTime.isValid(21, 10, 30) # returns true
QTime.isValid(22, 5, 62) # returns false

minute()¶

Return type:: int

Returns the minute part (0 to 59) of the time.

Returns -1 if the time is invalid.

See also

hour() second() msec()

msec()¶

Return type:: int

Returns the millisecond part (0 to 999) of the time.

Returns -1 if the time is invalid.

See also

hour() minute() second()

msecsSinceStartOfDay()¶

Return type:: int

Returns the number of msecs since the start of the day, i.e. since 00:00:00.

See also

fromMSecsSinceStartOfDay()

msecsTo(t)¶

Parameters:: t – QTime
Return type:: int

Returns the number of milliseconds from this time to t. If t is earlier than this time, the number of milliseconds returned is negative.

Because QTime measures time within a day and there are 86400 seconds in a day, the result is always between -86400000 and 86400000 ms.

Returns 0 if either time is invalid.

See also

secsTo() addMSecs() msecsTo()

__ne__(rhs)¶

Parameters:: rhs – QTime
Return type:: bool

Returns true if lhs is different from rhs; otherwise returns false.

__lt__(rhs)¶

Parameters:: rhs – QTime
Return type:: bool

Returns true if lhs is earlier than rhs; otherwise returns false.

__le__(rhs)¶

Parameters:: rhs – QTime
Return type:: bool

Returns true if lhs is earlier than or equal to rhs; otherwise returns false.

__eq__(rhs)¶

Parameters:: rhs – QTime
Return type:: bool

Returns true if lhs is equal to rhs; otherwise returns false.

__gt__(rhs)¶

Parameters:: rhs – QTime
Return type:: bool

Returns true if lhs is later than rhs; otherwise returns false.

__ge__(rhs)¶

Parameters:: rhs – QTime
Return type:: bool

Returns true if lhs is later than or equal to rhs; otherwise returns false.

second()¶

Return type:: int

Returns the second part (0 to 59) of the time.

Returns -1 if the time is invalid.

See also

hour() minute() msec()

secsTo(t)¶

Parameters:: t – QTime
Return type:: int

Returns the number of seconds from this time to t. If t is earlier than this time, the number of seconds returned is negative.

Because QTime measures time within a day and there are 86400 seconds in a day, the result is always between -86400 and 86400.

secsTo() does not take into account any milliseconds.

Returns 0 if either time is invalid.

See also

addSecs() secsTo()

setHMS(h, m, s[, ms=0])¶

Parameters:

h – int
m – int
s – int
ms – int

Return type:

bool

Sets the time to hour h, minute m, seconds s and milliseconds ms.

h must be in the range 0 to 23, m and s must be in the range 0 to 59, and ms must be in the range 0 to 999. Returns true if the set time is valid; otherwise returns false.

See also

isValid()

toPython()¶

Return type:: object

toString(format)¶

Parameters:: format – str
Return type:: str

toString([f=Qt.TextDate])

Parameters:: f – DateFormat
Return type:: str

This is an overloaded function.

Returns the time as a string. The format parameter determines the format of the string.

If format is TextDate , the string format is HH:mm:ss; e.g. 1 second before midnight would be “23:59:59”.

If format is ISODate , the string format corresponds to the ISO 8601 extended specification for representations of dates, represented by HH:mm:ss. To include milliseconds in the ISO 8601 date, use the format ISODateWithMs , which corresponds to HH:mm:ss.zzz.

If the format is RFC2822Date , the string is formatted in an RFC 2822 compatible way. An example of this formatting is “23:59:20”.

If the time is invalid, an empty string will be returned.

See also

fromString() toString() toString() toString()

toString(format)

Parameters:: format – str
Return type:: str